2009 ASTRA Best Toys for Kids winner! Think Green! Build over 125 projects, using the flexibility of our award-winning Snap Circuits, and learn about environmentally friendly energy and how the electricity in your home works. Use a solar cell and a windmill to harness nature's natural energy. Discover how a simple hand crank can generate electricity. A full-color educational manual explains all the manners of "green" energy including: geothermal, hydrogen fuel cells, wind, solar, tidal, hydro, and others. Contains over 40 parts.