Circuit Blox Lights Starter, Circuit Board Building Blocks Classroom Set, 128 PiecesThis set provides four Circuit Blox Lights Starter kits (CB 0194), all packed into a sturdy storage case for sharing in the classroom. Each kit provides hours of fun and educational play. The colorful building blocks contain electronic components such as a battery module, sound activation module and LED plate. And with additional transparent spacers you can build cool structures that illuminate to your voice or dance to sounds and music! Recommended