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!
Get one of the craziest and coolest kaleidoscopes around!
Build a magnetic levitating train with this science fair project kit!
Build an electromagnet, an electrical catapult, a doorbell chime, a telegraph, and more with this kit!
Build over 60 projects with this deluxe version of the Snap Rover kit!
Check out this high-quality gyroscope!
Discover how solar cells make electricity with this awesome kit!