Snap Circuits Junior makes learning electronics a snap. Contains over 30 parts. Just follow the colorful pictures in our manual and build over 100 projects, such as AM radios, burglar alarms, flash lights, doorbells, and much more. 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.