On the under side of the cardstock are these connections:
- Paper fastener #1 to minus ( -) side of coin battery,
- Plus (+) side of coin battery to long LED lead,
- Short LED lead to paper fastener #2.
When you connect one paper fastener to the other by the paper clip, you complete the circuit: LED Lights
Any conductor that connects the fasteners will make the LED light! To test if an object is a conductor, place the object so it joins fastener #! to fastener #2. If the LED lights, the object is a conductor!