- three potatoes
- galvanized nails (coated in zinc)
- copper coins
- copper wire
- alligator clips
- scissors, knife
- tiny LED, red require the least amount of energy
- Stick a nail into one end of each potato.
- Stick a copper coin into the other end of each. You can use a knife to cut a slit to squeeze in the coin.
- Cut the wire into four pieces, each about 6 inches (15 cm). Make sure it is copper wire. If it is covered with a plastic casing, please strip it away at the ends.
- One end of the wire gets wrapped the metal part of an alligator clip. Clip it to the coin.
- Arrange the potatoes in line. Wrap the loose ends of the wire around the nail in the next potato. Wrap the extra wire around the first nail.
- Connect the LED to the wires from the first nail and last coin, to complete the circuit. It should form a circle.
- The coin is like the plus side on a battery.
- The nail is the negative side.
- Make sure no wires are touching each other. That would redirect the flow of electrons, electricity.
- The LED should light up.
- If it doesn’t work, try a smaller LED if possible or make more three-potato batteries and connect the end wires from all of the coins together and then all of the end wires from the nails together and then use a wire from each of those bundles to connect to the LED.