Create Working Electronic Circuits Snap Circuits Jr (SC-100) comes with over 30 components to create 101 different electronic projects. The pieces, which include snap wires, slide switches, an alarm circuit, a music integrated circuit, and a speaker, snap together easily on the included plastic grid--no soldering required. Each piece is numbered and color-coded to make identifying them easy. These components combine to create working circuit boards just like the ones found inside televisions, radios, and other electronic devices. With its easy-to-follow instructions, Snap Circuits gives your child a hands-on education in how electrical circuits work to run the everyday devices that they're familiar with. They'll also gain valuable lessons in building and in following instructions. The project manual includes large color illustrations and simple directions for each project. <br>The projects include a sound-activated switch, a musical doorbell, a voice-controlled lamp, a flying saucer, and a light police siren. With these projects, children will experiment with things like electric switches, integrated circuits, digital circuits, fuses, and the transformation of circuit sounds into other sounds. Includes: Plastic snap-grid, 32 electrical components, and 1 project manual. 1 Elenco Snap Circuits Battery Eliminator - No need to replace batteries! Recommended for children 8 and older.