Build over 750 projects! Constructing circuits and studying electricity has never been more fun. Comprehensive set includes over 80 pieces in a convenient storage box. Pieces simply snap together on a special grid to create circuits with different functionality and purposes. Includes four instruction manuals with detailed directions and easy-to-see colored diagrams for 692 projects. An additional manual is included for another 74 projects that can be investigated using computer software. The software allows students to “see” the electrical signals in the circuits just like engineers do by using oscilloscopes and spectrum analyzers. Interface cable is included. Four AA batteries are required and available separately. The possibilities are almost endless with the ease and versatility of Snap Circuits!