used condition. SNAP CIRCUITS JUNIOR BY ELENCO MODEL SC-100 Grades 2-4; Over 100 experiments using light, sound, movement and more. No wires to connect or tools required. Uses 2 "AA" batteries (included). Description-Students can build over 100 experiments using light, sound, movement and more. Plastic circuit board comes with an easy to follow guide and over 30 parts that snap on so there are no wires to connect or tools required. You can even play electronic games, build radios, digital voice recorders and more. Uses 2 AA batteries, included