This is not your ordinary sphere. By lightly grabbing two ends of the sphere and pulling, you can make it expand from 5.5 inches to a whopping 12 inches! The Mini Hoberman Sphere is a great way to have fun and teach adults and children about geometry at the same time. The sphere includes a game and activity sheet to help you explore all kinds of interesting ways to use it!
This is a classic demonstration toy of the powers of magnetic fields!
Every kid needs one of these spheres!
Easily assemble a working alarm motion detector!
This superb chemistry set features 350 mind-boggling experiments!
This glass Erlenmeyer mug makes an excellent gift!
This caffeine molecule mug makes an excellent gift!
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