This is an amazing new technology that allows kids to design and engineer working circuits on paper. They will use LED lights, disc batteries and copper tape to learn how switches and different kinds of circuits work. They will also build their own night light and the brand new Mini Energy Stick is included to demonstrate a human circuit.Package contains: Mini Energy Stick, 6 LED Lights, 4 Circuit Cards, 4 CR 2032 3V Coin Cell (Button) Batteries, 2 Instruction Cards, 3 Metal Clips, 9' (2.74 m) roll of Copper Adhesive Tape, Plastic Bottle with Cap and Atomic Glow liquid, Plastic Cup, and Instructions.