The award-winning Snap Circuits Pro 500 Experiments kit contains more than 75 parts and detailed project books that allow you to build over 500 snap-together circuits — no tools required. You can assemble a musical doorbell, laser gun, race game, lie detector, electronic kazoo, mind reading game, telegraph, AM/FM radio, and so many more projects. For ages 8 and up; student/teacher guides are available at snapcircuits.net.