Thames & Kosmos wind power experiment kit

Here is a cool mechanical model you assemble to make a wind turbine with a small electric generator.

It comes with a 32-page manual that walks you through how to conduct more than 20 experiments -- including ones using different numbers of rotor blades, different blade angles and profiles, different wind speeds, different gear ratios, lifting a weight, lighting up an LED, and charging a rechargeable battery.

Here's the product page for the Thames & Kosmos Wind Power wind power experiment kit

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