TAK1056 Features: * Build wind-powered generators to energize your electric vehicles and charge * Six models include a glider, sail car, jet car, tractor, racecar, and tricycle * Can adjust the angle and number of wind turbine blades * Explore this amazing, free source of renewable energy * Kit gives illustrated step-by-step instructions for assembling two windmills * Six model vehicles, and conducting various experiments * Ages 8 and up Includes: * Includes two styles of wind turbine blades and a gearbox with three different gear ratios for experimenting Color/Finish: * 40-page color instruction book Assembly Instructions: * Assembly required Dimensions: * Guide book dimensions: 8.25"" W x 11.5"" D