Searching for the best educational science reference kits in 2026? The right kit can spark curiosity, teach scientific principles, and provide hands-on fun. The National Geographic Earth Science Kit stands out for its comprehensive content, making it ideal for curious kids aged 8-12, while the UNGLINGA 40+ Experiments Science Kit offers a great mix of experiments for beginners. The main challenge is balancing variety, educational value, and safety — more complex kits often come at a higher cost or require supervision. Continue reading for a detailed comparison that will help you find the perfect fit for your child’s age, interests, and skill level.
Key Takeaways
- The most versatile kits offer over 100 experiments, providing long-term engagement for kids interested in science.
- Safety features and age-appropriate complexity are critical, especially for younger children or beginners.
- Higher-priced kits tend to include more tools and experiments, but some affordable options still deliver excellent educational value.
- Brands like National Geographic and Carson Dellosa consistently produce well-rounded, reliable kits for different age groups.
- Consider whether the kit emphasizes chemistry, earth sciences, or general STEM to match your child’s specific interests.
| UNGLINGA 40+ Experiments Science Kit for Kids – Chemistry Set, Educational Toy Gift |  | Best Overall for Young Aspiring Chemists | Number of Experiments: Over 40 | Suitable for: Kids | Includes: All necessary materials (except household items) | VIEW LATEST PRICE | See Our Full Breakdown |
| Carson Dellosa STEM Challenge Science Kits for Kids Age 5-7 |  | Best for Early STEM Engagement in Young Children | Number of Cards: 30 | Card Dimensions: 7 ¾ inches x 5 ½ inches | Divider Dimensions: 7 ¾ inches x 8 inches | VIEW LATEST PRICE | See Our Full Breakdown |
| National Geographic Earth Science Kit with 100+ Activities for Kids 8-12 |  | Best for Extensive Earth Science Exploration | Number of activities: 100+ | Recommended age: 8-12 | Includes: Crystal growing, volcano experiments, rock collection, geologic dig kits | VIEW LATEST PRICE | See Our Full Breakdown |
| 24-Piece Educational Lab Science Experiments Kit for Kids |  | Best Compact Starter Kit for Young Explorers | Number of Test Tubes: 10 | Included Components: Plastic test tubes with caps, droppers, test tube holder | Age Range: 36 months+ | VIEW LATEST PRICE | See Our Full Breakdown |
| Science Kit for Kids – 80 Experiments with Scientific Tools and Costume Role Play – Educational STEM Toy for Ages 6-9 |  | Best for Interactive, Role-Play Learning | Number of Experiments: 80 | Age Range: 6-9 years | Included Items: Goggles, chemicals, petri dishes, test tubes, gloves, droppers, balloons, costumes | VIEW LATEST PRICE | See Our Full Breakdown |
| UNGlinga 150 Experiments Science Kits for Kids, STEM Educational Project Toys for Boys and Girls |  | Best Overall for Variety and Engagement | Number of Experiments: 150 | Suitable for: Kids | Includes: Science tools and materials | VIEW LATEST PRICE | See Our Full Breakdown |
| Carson Dellosa STEM Challenges, Hands-On Science Kits for Kids Ages 7-10 |  | Best for Structured Classroom or Homeschool Use | Number of Cards: 30 | Material: Cardstock | Dimensions: 7¾ inches x 5½ inches per card | VIEW LATEST PRICE | See Our Full Breakdown |
| UNGlinga 272 Experiments Science Kit for Kids, Chemistry Set, STEM Toys for Boys and Girls, Educational Learning Project |  | Best for In-Depth Chemistry Fun and Critical Thinking | Number of Experiments: 272 | Includes: Test tubes, measuring spoon, beaker, conical flask | Recommended Age: Kids | VIEW LATEST PRICE | See Our Full Breakdown |
| National Geographic Junior Chemistry Set with 50 Experiments for Kids |  | Best for Early Science Exploration in Younger Children | Number of Experiments: 50 | Lab Tools: 20+ | Recommended Age: 4+ | VIEW LATEST PRICE | See Our Full Breakdown |
| National Geographic Amazing Chemistry Set with 100+ Experiments for Kids Ages 8-12 |  | Best for Creative and STEM-Oriented Older Kids | Number of Experiments: 100+ | Age Range: 8-12 | Included Materials: Test tubes, beakers, pipettes | VIEW LATEST PRICE | See Our Full Breakdown |
| Discovery™ Super Reactions Science Kit – 66 Experiments STEM Lab for Kids, Includes Chemistry Tools, Volcano Mold, Slime, Reactions & Explosions, Educational Learning Toy, DIY Activity Set Gift, Ages 8+ |  | Best for Extensive Hands-On Chemistry Exploration | Number of Experiments: 66 | Included Tools: Test tubes, volcano mold, slime powder, citric acid, balloons, measuring cups | Ages: 8+ | VIEW LATEST PRICE | See Our Full Breakdown |
| educational science reference kit | Number of Experiments |
|---|---|
| UNGLINGA 40+ Experiments Scien | Over 40 |
| Carson Dellosa STEM Challenge | — |
| National Geographic Earth Scie | — |
| 24-Piece Educational Lab Scien | — |
| Science Kit for Kids | 80 |
| UNGlinga 150 Experiments Scien | 150 |
| Carson Dellosa STEM Challenges | — |
| UNGlinga 272 Experiments Scien | 272 |
| National Geographic Junior Che | 50 |
| National Geographic Amazing Ch | 100+ |
| Discovery™ Super Reactions Sci | 66 |
More Details on Our Top Picks
UNGLINGA 40+ Experiments Science Kit for Kids – Chemistry Set, Educational Toy Gift
This kit stands out for offering over 40 experiments that cover fundamental chemistry concepts, making it ideal for children who are eager to explore science hands-on. Compared with the National Geographic Earth Science Kit, it provides a broader range of chemistry-focused activities, though it requires some household items, which might complicate setup for younger children. The clear instructions and all-in-one approach make it accessible, fostering creativity and confidence in budding scientists. The main tradeoff involves its complexity; it may be too advanced for very young kids or those just starting out with science kits. Overall, this kit best suits children ready for more detailed experiments and parents seeking a comprehensive chemistry introduction.
Pros:- Over 40 engaging experiments that cover core chemistry concepts
- Clear, child-friendly instructions that enhance learning
- All-in-one kit with most materials included for convenience
Cons:- Requires some household items, adding extra prep work
- May be too advanced for very young children or beginners
Best for: Families seeking a high-capacity, chemistry-focused kit for children aged 8-12 who enjoy detailed experiments.
Not ideal for: Very young children under 6 or parents looking for a simple, all-in-one kit with minimal setup, as some household items are needed.
- Number of Experiments:Over 40
- Suitable for:Kids
- Includes:All necessary materials (except household items)
- Educational Focus:Chemistry, STEM
Our verdict“This kit is perfect for older kids with a serious interest in chemistry who want an extensive, hands-on learning experience.”
Carson Dellosa STEM Challenge Science Kits for Kids Age 5-7
This kit offers 30 activity cards that introduce young children to core science topics like plants, animals, and weather, making it a great choice for early STEM education. Unlike the larger National Geographic Earth Science Kit, it simplifies concepts into manageable challenges suitable for the preschool and early elementary level. Its portability and included divider make it easy to use at home or in classrooms, but the limited scope to basic topics means it isn’t ideal for kids ready for more in-depth experiments. The activities require common household materials and adult supervision, emphasizing safe, guided exploration. Overall, this set appeals most to parents and teachers seeking basic STEM activities for preschoolers and early learners.
Pros:- Engages children with practical, hands-on STEM activities
- Includes a variety of topics to broaden scientific understanding
- Portable design with easy-to-store divider
Cons:- Limited to basic science topics, not suitable for advanced learners
- Requires household materials and adult supervision for safety
Best for: Parents or educators looking for a portable, straightforward STEM kit for children aged 5-7 to introduce foundational science concepts.
Not ideal for: Older children or those seeking advanced experiments, as the content remains simple and limited in scope.
- Number of Cards:30
- Card Dimensions:7 ¾ inches x 5 ½ inches
- Divider Dimensions:7 ¾ inches x 8 inches
- Recommended Age:5-7 years
Our verdict“This kit is ideal for introducing young children to science through simple, engaging challenges in a portable format.”
National Geographic Earth Science Kit with 100+ Activities for Kids 8-12
This comprehensive kit offers over 100 activities, including volcano eruptions, crystal growing, and geologic digs, making it a top choice for children interested in Earth sciences. Compared with the UNGlinga 40+ Experiments Kit, it emphasizes geology and environmental phenomena, providing a more varied and educational experience. The included detailed guide supports deeper understanding, but some activities require adult supervision and could be too challenging for younger children outside the 8-12 age range. The durable materials and broad scope make it a solid investment for dedicated science learners, especially those fascinated by Earth’s processes. It excels in fostering curiosity and hands-on discovery in a structured way.
Pros:- Over 100 activities covering various Earth science topics
- Detailed learning guide enhances scientific understanding
- High-quality, durable materials for repeated use
Cons:- Requires adult supervision for some experiments
- May be too advanced for younger children outside the specified age range
Best for: Parents and educators of children aged 8-12 who want a wide-ranging, in-depth Earth science kit with diverse activities.
Not ideal for: Children under 8 or beginners seeking a simpler, less intensive science experience.
- Number of activities:100+
- Recommended age:8-12
- Includes:Crystal growing, volcano experiments, rock collection, geologic dig kits
Our verdict“This kit is best suited for older children eager to explore Earth sciences through a broad array of hands-on activities.”
24-Piece Educational Lab Science Experiments Kit for Kids
This smaller kit, with 10 test tubes and basic tools, offers a simple introduction to scientific exploration, making it a good choice for young children or beginners. Compared with the 80 Experiments Kit, it has fewer components and experiments, but its colorful design and easy-to-clean plastic parts make it accessible for very young learners and those just starting out. The limited number of test tubes means it’s less suitable for multiple simultaneous experiments, and durability concerns with plastic components have been noted. Despite these limitations, it provides a safe and straightforward way to foster curiosity in preschool-aged children or as a supplementary kit for early science activities.
Pros:- Encourages exploratory skills with colorful, easy-to-handle tools
- Suitable for very young children, ages 36 months and up
- Compact and easy to store or travel with
Cons:- Limited number of test tubes and experiments for extensive use
- Plastic components may have durability concerns over time
Best for: Parents of toddlers or preschoolers seeking a simple, compact science exploration set suitable for ages 3 and up.
Not ideal for: Older children or those ready for more complex experiments, as the kit’s scope is quite limited.
- Number of Test Tubes:10
- Included Components:Plastic test tubes with caps, droppers, test tube holder
- Age Range:36 months+
- Manufacturer:PPXMEEUDC
- Rank:#48,473 in Toys & Games
- Rank in Educational Science Kits:#431
Our verdict“This kit works well as an introductory, travel-friendly option for very young children beginning their scientific journey.”
Science Kit for Kids – 80 Experiments with Scientific Tools and Costume Role Play – Educational STEM Toy for Ages 6-9
This kit combines 80 experiments with role-play elements, including safety gear and costumes, making science engaging and immersive for children aged 6 to 9. Compared with the UNGlinga 40+ Experiments Kit, it offers a broader range of activities and adds a playful dimension with costumes and safety equipment, encouraging active participation. While the variety is impressive, some chemicals are stored in bottles that require careful handling, and adult supervision remains necessary. This kit is particularly suited for children who enjoy imaginative play alongside hands-on experiments, blending education and entertainment effectively.
Pros:- Wide variety of 80 experiments covering different topics
- Includes safety gear and costume elements to enhance engagement
- Encourages hands-on exploration and imagination
Cons:- Some chemicals require careful handling and adult supervision
- Limited details on the durability of chemical components
Best for: Parents and teachers seeking an engaging, role-play-oriented science kit for children aged 6-9 to promote active learning and imagination.
Not ideal for: Older children or those seeking purely educational, experiment-focused kits without role-play components.
- Number of Experiments:80
- Age Range:6-9 years
- Included Items:Goggles, chemicals, petri dishes, test tubes, gloves, droppers, balloons, costumes
Our verdict“This kit is ideal for young children who learn best through active, imaginative play combined with science experiments.”
UNGlinga 150 Experiments Science Kits for Kids, STEM Educational Project Toys for Boys and Girls
This kit stands out for its impressive array of 150 experiments across earth science, chemistry, and physics, making it ideal for curious children who thrive on variety. Compared with the UNGLINGA 272 Experiments Kit, it offers fewer experiments but maintains high quality and broader topic coverage in a more manageable package. However, its extensive content can be overwhelming and may require adult supervision for younger kids. The included tools are durable and child-friendly, supporting hands-on learning. The main tradeoff is that it might not satisfy older children seeking more advanced or specialized experiments. Overall, this kit is perfect for families or educators seeking a comprehensive, engaging introduction to multiple science disciplines without the complexity of larger sets.Pros:- Large variety of experiments covering multiple science topics
- High-quality, kid-safe tools and materials
- Encourages hands-on, interactive learning
Cons:- Requires adult supervision for some experiments
- Limited for children seeking more complex or advanced science activities
Best for: Parents or educators looking for a well-rounded, age-appropriate science kit that encourages exploration across multiple topics.
Not ideal for: Older children or those seeking advanced, specialized experiments, as this set offers broad but introductory-level activities.
- Number of Experiments:150
- Suitable for:Kids
- Includes:Science tools and materials
- Topics Covered:Earth science, chemistry, physics
Our verdict“This kit is best suited for young science enthusiasts eager to explore a wide range of topics in a manageable, engaging way.”
Carson Dellosa STEM Challenges, Hands-On Science Kits for Kids Ages 7-10
This set offers 30 colorful activity cards that introduce children to physical, life, earth, and space science through straightforward tasks, making it ideal for classroom or homeschool environments. While less extensive than the UNGLINGA 272 Experiments Kit, it provides focused, easy-to-follow challenges that promote critical thinking. Its portable design and included organizer make it convenient for group activities, but it does rely on common household or classroom materials, which could be limiting if supplies are unavailable. Unlike the broader scope of the National Geographic Junior Chemistry Set, this set emphasizes diverse science topics in a compact format. It’s best suited for educators or parents who want a structured, activity-based approach to science learning for children aged 7-10.Pros:- Engaging, diverse science activities across multiple disciplines
- Easy-to-follow instructions suitable for the target age
- Portable with organized storage for easy classroom or home use
Cons:- Requires common household or classroom materials, which may need sourcing
- Limited to science topics, no other STEM areas included
Best for: Teachers or homeschooling parents seeking a curated, organized set of science challenges for children in grades 2-4.
Not ideal for: Families with children outside the 7-10 age range or those looking for open-ended experiments rather than structured challenges.
- Number of Cards:30
- Material:Cardstock
- Dimensions:7¾ inches x 5½ inches per card
- Includes:Divider for organization
Our verdict“This set makes the most sense for educators or parents who prefer structured, topic-diverse challenges for children in elementary grades.”
UNGlinga 272 Experiments Science Kit for Kids, Chemistry Set, STEM Toys for Boys and Girls, Educational Learning Project
With 272 experiments, this kit offers a wealth of activities like volcano eruptions, crystal growing, and holographic projections, making it ideal for children who love hands-on science with a focus on chemistry. Compared to the National Geographic Amazing Chemistry Set, it provides more experiments and a broader scope, though it can be more overwhelming for younger children. The included real lab tools promote authentic experimentation, but some activities may require adult supervision and careful handling. Its extensive content rewards dedicated young scientists, but the complexity may be a barrier for casual or younger users. This kit is best suited for children with a serious interest in chemistry and problem-solving, ready for a more comprehensive experience.Pros:- Wide variety of engaging chemistry experiments
- Includes real lab tools for authentic experience
- Encourages critical thinking and problem-solving skills
Cons:- Requires adult supervision for many experiments
- Materials may be limited to certain age groups, with some activities challenging for younger kids
Best for: Parents or educators seeking a detailed chemistry set that fosters critical thinking and in-depth exploration.
Not ideal for: Very young children or casual users who prefer simpler, less intensive experiments.
- Number of Experiments:272
- Includes:Test tubes, measuring spoon, beaker, conical flask
- Recommended Age:Kids
Our verdict“This kit is perfect for dedicated young chemists eager for a comprehensive and authentic lab experience, despite its complexity.”
National Geographic Junior Chemistry Set with 50 Experiments for Kids
This kit offers 50 experiments tailored for children aged 4 and up, combining durability and simplicity with illustrated instructions to spark early curiosity. Unlike the UNGLINGA kits, it is designed for very young children, emphasizing safety and ease of use. While it includes a good number of experiments, its scope is limited for older or more experienced young scientists who might find it too basic. The tools are child-safe and sturdy, but the reliance on household items like baking soda and vinegar means additional purchases may be necessary. This set is ideal for introducing preschoolers or early elementary students to basic chemistry concepts in a safe, approachable way.Pros:- 50 engaging experiments to foster early curiosity
- Child-safe, durable tools suitable for young kids
- Easy-to-follow illustrated instructions
Cons:- Limited to very young children, not suitable for older kids
- Requires household items that may need to be purchased separately
Best for: Parents and caregivers of children aged 4-6 seeking a safe, easy-entry chemistry experience.
Not ideal for: Older children or those seeking more complex experiments, as the set is geared toward early learners.
- Number of Experiments:50
- Lab Tools:20+
- Recommended Age:4+
Our verdict“This set makes early science accessible and safe for young children just beginning their exploration of chemistry.”
National Geographic Amazing Chemistry Set with 100+ Experiments for Kids Ages 8-12
Offering over 100 experiments, this set provides a rich variety of activities such as crystal growth, color-changing solutions, and glowing test tubes, making it ideal for children aged 8-12 who enjoy STEM projects. Compared with the UNGLINGA 150 Experiments Kit, it emphasizes creativity and experiments that produce visually striking results, encouraging imaginative scientific exploration. The inclusion of bonus experiments and all necessary materials supports extended engagement, but some activities may require adult supervision, especially for younger children. This kit is best suited for slightly older kids who want a comprehensive, visually stimulating chemistry experience that fosters both learning and creativity.Pros:- Over 100 diverse, hands-on experiments
- Includes all necessary materials plus bonus activities
- Encourages both STEM skills and creativity
Cons:- Some experiments require adult supervision
- Certain household items may need to be purchased separately
Best for: Parents or educators seeking a versatile chemistry kit that combines STEM learning with artistic experimentation for children 8-12.
Not ideal for: Children under 8 or those looking for a straightforward, less complex introduction to chemistry.
- Number of Experiments:100+
- Age Range:8-12
- Included Materials:Test tubes, beakers, pipettes
- Bonus Experiments:85
Our verdict“This set is ideal for older children who want an engaging, creative chemistry experience that sparks STEM interests and artistic expression.”
Discovery™ Super Reactions Science Kit – 66 Experiments STEM Lab for Kids, Includes Chemistry Tools, Volcano Mold, Slime, Reactions & Explosions, Educational Learning Toy, DIY Activity Set Gift, Ages 8+
The Discovery™ Super Reactions Science Kit stands out for offering a comprehensive set of 66 experiments, making it ideal for children eager to dive deep into chemistry. Unlike the National Geographic Amazing Chemistry Set, which emphasizes variety but fewer experiments, this kit emphasizes quantity and varied reactions, helping kids develop confidence through repeated practice. The inclusion of real lab tools like test tubes, a volcano mold, and slime ingredients fosters authentic scientific exploration. However, its extensive nature means it requires adult supervision, especially for younger children, and some small parts could pose a choking risk. This kit is best suited for slightly older children (8+) who can handle multiple experiments safely and want a robust, experiment-rich experience.
Pros:- Offers a large variety of 66 experiments for extended engagement
- Includes real lab tools and ingredients for authentic science activities
- Promotes critical thinking, creativity, and STEM skills
Cons:- Requires adult supervision for safe handling
- Some small parts could be choking hazards for younger children
- Limited to children aged 8 and above, not suitable for early learners
Best for: Children aged 8+ who are enthusiastic about in-depth, hands-on chemistry projects and have adult supervision available
Not ideal for: Parents seeking quick, simple experiments for younger children or those with safety concerns about small parts
- Number of Experiments:66
- Included Tools:Test tubes, volcano mold, slime powder, citric acid, balloons, measuring cups
- Ages:8+
- Materials:Red cabbage powder, glow paint, slime mix, baking soda, food coloring
Our verdict“This kit is an excellent choice for school-age children with a serious interest in chemistry who can safely manage multiple experiments and enjoy in-depth exploration.”
How We Picked
These products were selected based on their educational value, experiment variety, age appropriateness, and build quality. We prioritized kits that offer clear instructions, safe materials, and engaging content, ensuring they appeal to both beginners and more advanced learners. Cost-effectiveness was considered, but greater emphasis was placed on kits that provide lasting learning experiences and high-quality tools. The ranking reflects a balance between value, scope, and usability, helping buyers choose options suited for different learning goals and budgets.Factors to Consider When Choosing Educational Science Reference Kits
Choosing the right educational science reference kit depends on several key factors. Beyond the number of experiments, consider how age-appropriate and safe the kit is, as well as the variety of scientific disciplines included. Compatibility with your child’s curiosity level and your ability to supervise or assist are also important. The right kit can foster a lasting interest in science, but selecting one that’s too advanced or too simple may lead to frustration or boredom. Here are some essential considerations to keep in mind.Age Appropriateness and Safety
Ensure the kit matches your child’s age and skill level. Kits designed for younger children often feature larger, safer components and simplified experiments, reducing risk and frustration. For older kids, more complex experiments can stimulate critical thinking but may require supervision. Always check for non-toxic materials and clear safety instructions to avoid accidents and ensure a positive learning experience.
Experiment Variety and Educational Focus
Look for kits that cover multiple scientific disciplines such as chemistry, earth science, and biology to offer a well-rounded experience. Kits with a broad range of experiments tend to keep kids engaged longer and deepen their understanding. Conversely, if your child shows a specific interest, choosing a focused kit—like chemistry or geology—can be more impactful. Balance the scope with what your child can comfortably explore.
Quality of Materials and Instructions
High-quality, durable tools and components make the experiments more enjoyable and safe. Clear, detailed instructions are essential for independent use or guided learning, reducing confusion and setup time. Be wary of kits with poorly translated instructions or flimsy parts, which can detract from the educational experience and lead to frustration or safety concerns.
Cost and Value
Price often correlates with the number of experiments and quality of materials, but it’s not the sole indicator of value. Consider how many experiments are truly engaging and whether the kit offers reusable tools or materials for future exploration. Sometimes, investing a bit more upfront results in a kit that lasts longer and provides a richer learning environment.
Storage and Organization
A well-organized kit with designated compartments helps maintain tools and materials, encouraging responsibility and making clean-up easier. Kits with compact storage solutions are ideal for limited spaces or for taking on the go. Avoid cluttered, poorly organized sets, which can cause frustration and make it harder for kids to find what they need for each experiment.
Frequently Asked Questions
Are these science kits safe for young children?
Most educational science kits are designed with safety in mind, using non-toxic, child-safe materials and including clear safety warnings. Always supervise young children during experiments, especially when handling chemicals or small parts. Reading the instructions carefully before use helps prevent accidents and ensures a positive experience.
How many experiments does a typical kit include?
The number varies widely, from around 20 to over 100 experiments. Kits with more experiments generally offer more value and longer engagement, but quality matters more than quantity. Focus on whether the experiments are diverse and align with your child’s interests to maximize learning and fun.
Can these kits be used for homeschooling or classroom learning?
Yes, many kits are suitable for homeschooling and classroom use, especially those with comprehensive instructions and durable materials. Some kits even include lesson plans or activity guides to facilitate structured learning. Evaluate whether the kit’s content matches your curriculum goals and the age group of your students.
Are these kits reusable after completing the experiments?
Reusability depends on the kit. Many include reusable tools like test tubes and magnifiers, but consumable items such as chemicals or small parts may need replacement. Consider whether the kit provides additional supplies or if you might need to purchase extras to extend the experience.
Is it better to choose a kit focused on one science discipline or a general STEM kit?
If your child has a specific interest, a focused kit like chemistry or geology can deepen their understanding. However, a general STEM kit offers broader exposure, helping kids discover multiple fields. Your choice should align with your child’s curiosity and your educational goals—specialized kits suit targeted learning, while comprehensive sets foster exploration.
Conclusion
For those seeking the best overall experience, the National Geographic Earth Science Kit offers a broad, engaging introduction to multiple sciences and is suitable for ages 8-12. Budget-conscious buyers will find great value in the Carson Dellosa STEM Challenge Kits, which deliver a variety of experiments at a lower price point. Parents new to science kits should consider the UNGLINGA 40+ Experiments Science Kit for its simplicity and safety, making it ideal for beginners. For advanced young scientists, the UNGlinga 272 Experiments Kit provides extensive content for sustained exploration. Finally, educators or dedicated hobbyists looking for a premium option may prefer the National Geographic Amazing Chemistry Set with its in-depth experiments and high-quality tools.
