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.