• Build 2 giant wind turbines, almost 1 meter high.
• The energy generated by the wind can turn a LED light on or recharge a battery!
• Full color 40-page instruction manual, complete with instructions to build models and explanations of each principle used.
• Requires 1 AA/LR06 battery or a rechargeable battery – not included.

This kit includes two styles of wind turbine blades and a gearbox with three different gear ratios for experimenting. You can adjust the angle and number of wind turbine blades to make best use of the wind, to make the LED light up brightly, and to charge the rechargeable battery as fast as possible. Let’s explore this amazing, free source of renewable energy!