High-quality weight with a hook fitted through the center allow you to hook weights together in tandem or use them one at a time.
Pass-through hooks are included on both sides of the weight!
Discover how solar cells make electricity with this awesome kit!
Create beautiful art with this amazing sun paper!
This glass Erlenmeyer mug makes an excellent gift!
Learn about detective science through this fun fingerprinting kit!
This project book and sample kit introduces you to shape-memory alloy technology!
This simple but amusing magnetic toy will keep you busy for hours!