Wikijunior:Big Book of Fun Science Experiments/Lemon battery

To make a lemon battery you will need:

 * A lemon
 * A penny
 * A nickel
 * Copper wire
 * An LED or calculator.

Experiment:

 * First, use some wire to cover a penny and other piece of wire on the nickel.
 * Insert the coins in the lemon and put the other sides of the wires in the sides of the LED.
 * Then you will see the electric power of the lemon flowing in the diode.