Watch this working 4M wind turbine capture the winds energy and turn it into light! The kit will teach you how this vital renewable-energy technology works. About 49cm in height, with a 34cm blade span once built. Includes: a nacelle body, cover, 3 rotor blades, accessories and detailed instructions. Required: a small screwdriver and clean 2L soda bottle (not included). Age 8+ years. Part of the Eco-Engineering range.