A man and a little girl walk into a room and sit behind a table. The father picks up a battery and shows it to the girl. The father then picks up a small light bulb. The girl connects the bulb to two wire and the battery creating a circuit. The bulb lights. The pair then creates a circuit using a door bell. They use various metal materials to complete the circuit. The circuit is not complete when the girl tries with a rubber ball, glass cup, wood pencil, and a plastic handle. .