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 312 total pieces, plus instruction manuals, online curriculum and 4 storage cases. Kids can build 800 different projects, including an electromagnetic inductive windmill. 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.