Snap Circuits Electronics Motion Detector Mini Kit | Build Motion Projects with Snap-Together Electronic Components | 12 Projects | Electronics Exploration Kit | Great STEM Product Snap Circuits(R) Motion Detector When motion is detected, a laser sound is emitted and the color LED flashes Snap Circuits(R) use brightly-colored electronic components that snap onto a clear plastic base to build different circuits Kit includes an instruction sheet for the main project and up to 5 additional projects Requires 3-AA batteries (not included)