Snap Circuits comes with over 80 pieces to create over 750 different electronic projects. The pieces, which include snap wires, slide switches, resistors, an FM radio module, and a solar cell, 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.