The Snap Circuits Mini Musical Recorder features brightly-colored electronic components that snap onto a clear plastic base to build different circuits. With this kit, you can build a working musical recorder that plays your own recording plus 3 songs. Includes 3 additional projects: eraser, playing music, and loudness control. Requires 3 AA batteries. Includes a colorful and easy-to-follow instruction sheet that make these electronic experiments easy and fun to build.