How to Make a Lemon Battery
Learn how to make a lemon battery with this great video. Use a copper penny, a galvanized nail coated in zinc, some wires and the citric acid from inside a lemon to create your very own battery capable of lighting a LED.
A volt meter will help you understand the voltage while you follow the detailed instructions and scientific explanations provided in the video. A well as being of general interest it also makes a cool science fair project.