Potato Can Help Power A light bulb

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Light bulb Ok, so we expect this one is more for fun that anything else, but it's still fascinating and great for entertaining the kids/grandkids. Did you know that potatoes contain lots of energy, and the chemical reactions that take place between the potato juices and a couple of dissimilar metals create enough voltage to power a small electrical device?

To try this for yourself, you will need: 1 large potato, two small coins, two zinc-plated standard nails, three small pieces of copper wire and a small, low wattage light bulb:

1. Cut the potato in half, cut a slit in each half. Wrap the coins in the copper wire a few times, using different wire for each coin. Then slide the coins into the slits.

2. Take the remaining piece of copper wire and wrap it around one of the zinc plated nails. Stick the nail into one of the potato halves.

 3. Take the wire that's connected to the coin in the half of the potato that also contains the nail, and wrap it around the second nail. Stick the second nail into the other potato half.

4. Connect the two loose ends of the copper wire to the light bulb and it will light up.

Be careful when allowing children to handle the copper wires as they contain a small electrical charge, and don't perform the experiment near to an open flame.