These Snap Circuits make learning electronics easy and fun! Just follow the colorful pictures in the included manual and build exciting projects, including FM and AM radios, digital voice recorders, burglar alarms, 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. Enjoy hours of educational fun while learning about electronics. No tools required. Uses AA batteries. The Snap Circuits Standard Version contains over 60 standard parts 20 computer interfaced experiments. Model comes with illustrated instructions to build over 300 exciting projects.