This is the child's comprehensive renewable energy source experiment kit. A wind turbine, solar cell, electrolytic cells, and a hand-operated dynamo generate electricity that is stored in a rechargeable battery and then is distributed through the integrated circuit board to power a motor, LEDs, and buzzer using wiring terminated with alligator clips. The built-in voltmeter allows children to observe the effectiveness of each source of energy; no more than three volts total. The kit's sourcebook explains different methods for reducing energy costs at home while providing a primer about the world's energy sources. Requires two AA batteries for voltmeter. Ages 8 and up. 12 1/2" H x 8" W x 9 1/2" D. (1 1/2 lbs.)