This set provides four Circuit Blox Lights Plus kits (CB-0200), all packed into a sturdy storage case for sharing in the classroom. Contains 76 parts. Directly compatible with other brick building construction sets. Requires 12 "AA" batteries. Each kit provides hours of fun and educational play. The colorful building blocks contain electronic components such as a battery module, LEDs and a touch activation module and LED plate. With the LED modules you can build cool structures that light from head to toe!