Snap Circuits make learning electronics a snap. Contains over 75 parts. Just follow the colorful pictures in our manual and build over 500 projects including voice recording IC, FM radio module, analog meter, transformer, relay, and 7-segment LED display. You can even play electronic games with your friends. All parts are mounted on plastic modules and snap together with ease. No tools required. Uses AA batteries - not included. WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs.