Snap Circuits® makes learning electronics easy and fun. Just follow the colorful pictures in our manual and build exciting projects such as AM radios, 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. Includes Projects 1-305 manuals (includes all of the SC100 projects and 200 new ones.)Features:• Contains over 60 Snap-Together parts. Build over 300 exciting projects.• Electrical components provide students ages 8+ with hands-on experience designing and building models of working electrical circuits.• Snap-together parts require no tools and ensure correct connections.• Requires 4 " AA" batteries (not included)• Clear and concise illustrated manual included and available online.• For ages 8 and up.WARNING CHOKING HAZARD- Small parts. Toy contains a cord. Not for Children under 3 yrs.