Solar powered rolling ball track kit

Here is a simple kit that allows you to make a solar-powered rolling-ball track. Once assembled, provide the little solar panel with some sunlight and the machine will sending the balls cycling around the track.

Here's the link for this kit that is called the Solar Roller Coaster

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Green Science Windmill Generator by Toysmith

I am pleased by the fact that many of the newer mechanical toys have "green" theme. Take this small scale wind generator. The Windmill Generator has a gear motor (which serves as a generator) and 6 inch propeller with a tail. After a bit of assembly you can watch the wind light up its LED bulbs.

From the product description:

How is energy produced by using windmills? Build this amazing wind generator and learn about renewable energy/ "green energy". Watch the LED glow as it is powered by free energy from the wind. No batteries required! Help save the planet by using a recycled plastic bottle to support your wind generator. Ages 8+

Here is the link to the Green Science Windmill Generator

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