Elenco's Snap Circuits make learning electronics a "snap". Just follow the colorful pictures in the manual and build exciting projects, such as FM radios, digital voice recorders, AM radios, burglar alarms, doorbells, and much more. You can even play electronic games with your friends. All electronic Snap Circuits parts are mounted on plastic modules and snap together with ease. Enjoy hours of educational fun while learning about electronics. No tools required. Uses AA batteries or ACSNAP battery eliminator.