Potato Clock - Make a Potato Battery to Power an LED Clock

Let your imagination run with this idea. There are variations on the potato clock and other things you can try.

• See what else your potato battery can power. It should be able to run a computer fan. Can it light a light bulb?
• Try substituting copper pennies for the copper wire.
• Potatoes are not the only foods that can act as electrochemical cells. Experiment with lemons, banans, pickles, or cola as a power source.