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4M
4M 7 Crystal Growing Science Experimental Kit with Display Cases - Easy DIY STEM Toy Lab Experiment Specimens, Educational Gift for Kids, Teens, Boys & Girls 7 Crystals
4.4
Based on 19,970 reviewsReal-World Testing
30 days of real-world testing
Technical Specifications
Complete product details
- Product Dimensions
- 8.5 x 9.5 x 3.25 inches
- Item Weight
- 1.05 pounds
- ASIN
- B00ITX1K4K
- Item model number
- 5557
- Manufacturer recommended age
- 10 - 15 years
- Best Sellers Rank
- #2,461 in Toys & Games (See Top 100 in Toys & Games) #35 in Educational Science Kits
- Customer Reviews
- 4.4 4.4 out of 5 stars 19,970 ratings 4.4 out of 5 stars
- Is Discontinued By Manufacturer
- No
- Release date
- January 4, 2019
- Manufacturer
- Toysmith
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About the Author
Expert analysis by Emilia Thorne
Emilia Thorne
Expert ReviewerStaff Writer
Emilia explores cross‑platform apps for Review Atlas, measuring launch speed, offline behavior, and how seamlessly they share data. She favors tools that respect your time and attention, and her “week with” reviews surface subtle annoyances you’ll be glad to avoid.
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View Full ProfileHow We Tested This Product
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Testing Period
30 days
Tested By
Emilia Thorne
Our Testing Process
- We purchase all products at full retail price to ensure unbiased testing
- Products are tested in real-world conditions matching everyday use
- Our experts conduct both objective measurements and subjective evaluations
- Reviews are regularly updated as new products enter the market
- Tested according to our Adult Sex Toys & Games testing methodology
Last updated: November 17, 2025
|Independently tested and reviewed