Wind Energy Generator Physics Windmill Learning Kit for Kids Description: The Wind Energy Experiment Package is an easy-to-use wind experiment kit. It can convert wind energy into electricity, light a light bulb. Generating functions, do not need very high wind force, can easily light bulbs. It can exercise hands and brain ability. Cultivate children's curiosity and willingness to learn, very interesting. This DIY requires installation near the fan to find the area and distance stabilized by wind. When it rotates at high speed, the bulb will light up. You can use your mouth to blow s without fan, you can light the bulb. Specification: Material: Size Chart: Engine diameter: 2.4 cm/0.94 inch Height: 3.1 cm/1.22 inch Output shaft diameter: 0.2 cm/0.08 inch Total fan diameter: 12 cm/4.72 inch Total height: 3 cm/1.18 inch fan: 0.195 cm/0.08 inch The package includes: 1* 1 * Cable 1 * fan 1 * bulb Note: 1. 2. Due to the difference between different monitors, the image may not reflect the actual color of the item. 3.