Use this open-type Hoffman screw clamp for a variety of demonstration or science experiment applications. It is made of chrome-plated brass, and features a 1" opening. Good for science projects, lab use and more.
Comprehensive collection of 30 fossils.
The Hoberman Sphere expands and contracts with a magical motion so fluid and simple that kids can't help but play with it for hours.
This adapter-powered butterfly uses Flexinor wires to create a realistic visual effect!
This caffeine molecule mug makes an excellent gift!
Ever wonder how to survive in the wilderness? These cards can help!
Experience this sphere powered by the sun!
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