Winner of Creative Child Magazine Creative Play of the Year, Product of the Year for 2017, TillyWig Brain Child, and Purdue University Engineering and Design Award! Great addition to any STEM program. Learn all about electricity, current and voltage. Discover how lights, alarms, motors, switches and more work all while building fun projects. Build a real working FM radio and listen to your favorite station. Compatible with other building brick sets. Build 120 different projects. Contains 46 parts Requires 3 "AA" batteries Ages 8 and up. To download a PDF version of the manual click here .