Learn about energy sources and how to think green. Build over 125 projects; using the flexibility of our award-winning Snap Circuits; to have loads of fun learning about environmentally friendly energy and how the electricity in their home works. Includes full-color manual with over 100 pages and separate educational manual. The included educational manual will explain all the forms of environmentally friendly energy including: geothermal; hydrogen fuel cells; wind; solar; tidal; hydro; and others.