Discover how lights, alarms, motors, switches and more work, all while building fun projects. 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. Classroom set features 120 total pieces, plus curriculum and instruction manuals. Kids can build 85 different projects. Comes with four battery modules that each requires 3 AA batteries (sold separately). For ages 8 and up. Ships directly from the manufacturer, please allow 1-3 weeks for delivery.