Exploratorium
Exploratorium: Science Snacks: Penny Battery
In this experiment, students will learn how to make a battery with a water solution and two types of metal. This is then used to power an LED light. Includes video demonstration.
PBS
Pbs: Rough Science: Island Power Plant
Learn how to create electricity and your own electrical gadgets! Site provides users with information on how to make a battery, flashlight, buzzer an electric motor.
Hunkins Experiments
Hunkin's Experiments: Make Batteries Out of Money/potatoes
Hunkin's Experiments is a group of simple cartoon illustrations of scientific principles. Some would work well in the classroom, but others have little value beyond entertaining students. All of the projects are easy to do. This one...