Snap Circuits 200 Projects E-Blox Set Enjoy hours of educational fun while learning about electronics and introducing your aspiring engineer to the world of electronic circuitry Over 200 unique projects included in the easy to follow manual - AM Radios - Burglar alarms - Doorbells and much more All components are mounted on plastic grids and snap together with ease; No tools required You can even play electronic games with your friends Requires 3 AA batteries for experiments (not-included); Ages 8 and up