There are 395 different projects to build and all parts are compatible with our Power BloxTM line to add even more fun to your building experience Some of the fun projects you will build include light activated sirens alarms birthday song flying fan and transistor amplifiers The kit includes various switches lamp heart and star LEDs speaker audio block amplifier block FM receiver block motor resistors photoresistor capacitors transistor and more Features . 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 395 different projects. Contains 68 parts. Requires 3 AA batteries. Ages 8 and up. Build a real working FM radio kit with flashing lights Specifications . Weight 3 lbs