The vanes, or wings, in this solar radiometer are alternately dark and light in color. When the light strikes these wings it transfers heat to each one - but not at the same degree. The lighter wing reflects the rays and the darker wing absorbs. The stronger the light, the more energy there is to heat up the darker side of the wing causing the wings to spin faster. It spins under the solar light or a regular light bulb. Great for science projects, as a gift or as a desk amusement!
This classic device is used to demonstrate the conservation of mechanical energy.
Build a magnetic levitating train with this science fair project kit!
This classic desk toy will keep you amused!
Watch what your music can create with this amazing Snap Circuits set!
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 glass Erlenmeyer mug makes an excellent gift!
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