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!
Ever wonder how to survive in the wilderness? These cards can help!
Build your own 10 inch kaleidoscope with this great kit!
This ultimate chemistry set features 250 mind-boggling experiments!
This microscope is so versatile you can even take it with you on a job site!
Build an electromagnet, an electrical catapult, a doorbell chime, a telegraph, and more with this kit!
Build your own windmill generator kit by recycling a plastic bottle!
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