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!
Build your own windmill generator kit by recycling a plastic bottle!
This toy combines the wonders of Sea Monkeys and glow-in-the-dark fun, all in one!
Learn how solar cells transform light into electrical energy with this great kit!
This black scorpion specimen is great for the classroom setting!
Comprehensive collection of 30 fossils.
Get this great introductory chemistry kit for your favorite young scientist!
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