Learn about energy sources and how to "think green". Build over 125 projects and learning about environmentally friendly energy and how electricity works. Includes full-colored manual with over 100 pages and separate educational manual. Features-Hand Crank-Solar Cell-FM Radio-Energy Compartment-Rechargeable Battery-Windmill-Clock and Analog Meter. Compatible with the Snap Circuits family of electronic learning kits.FeaturesBuild over 125 projects including: