With E-Blox you can build 3D circuits directly into your brick structures, so they can come to life with light, sound or motion! Compatible with other popular brick products, they offer a great addition to any STEM program. Set contains 22 total pieces and allows you to build 59 different projects. Discover how lights, alarms, motors, switches and more work, all while building fun projects. Comes with a battery module that requires 3 AA batteries (sold separately) and an instruction manual. For ages 8 and up.