8 years & up. Wind is becoming a popular source of clean, renewable energy in today's time. This kit gives users the ability to assemble a realistic wind turbine with adjustable rotor blades and an electric generator. Conduct experiments to learn how to optimize its' performance. Learn about alternate forms of power and receive scientific information on turbines through the manual. Kit includes a 32 page manual and guides you through 5 experiments with your wind turbine.