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.