Elenco's Snap Circuits makes learning electronics easy and fun! Just follow the colorful pictures in your 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. Uses "AA" batteries. Not included. Awards: The National Parenting Center-Seal of Approval, Dr. Toy 100 Best Children's Products, Dr Toy Best Educational Products Valuable component to a rounded STEM curriculum Build working models of a photo sensor, a flashing light, and an adjustable-volume siren. More than 100 exciting projects in all with included 30+ snap together parts Electrical components provide students ages 8+ with hands-on experience designing and building models of working electrical circuits Clear and concise illustrated manual included and available online Electrical parts provide students grades 2 and up (age 7+) with hands-on experience designing and building models of working electrical circuits Snap-together parts require no tools and ensure correct connections Includes 30 parts, and instructions for over 100 projects, including working models of a photo sensor, a flashing light, and an adjustable-volume siren Requires 2 AA batteries (sold separately)