The Snap Circuits Mini Motion Detector kit features brightly-colored electronic components that snap onto a clear plastic base to build different circuits. With this kit, you can build a motion detector, and whenever somebody walks in front of it, the sound of a laser comes out of the speaker and the red light flashes! Includes 6 additional projects: a Siren Motion Detector an Alarm Motion Detector, a Police Car, a Fire Engine, a Machine Gun, and a European Siren. Includes a colorful and easy-to-follow instruction sheet that make these electronic experiments easy and fun to build.