A LEMON BATTERY Ben discovered that lightning is electricity. He invented the term battery, but did not invent the first battery. Materials: Lemon Two 6” pieces of copper wire Nail Metal thumbtack Small light bulb Scissors Directions: 1. Push the nail in one end of the lemon and place the tack in the other end. 2. Twist a piece if wire around the tack and the other around the nail. 3. Touch the two ends of wire and the light bulb and it will light.