Take a look at this video!
"What is Makey Makey? MaKey MaKey is an invention kit for the 21st century. Turn everyday objects into touchpads and combine them with the internet. It's a simple Invention Kit for Beginners and Experts doing art, engineering, and everything inbetween.
How Does it Work? Alligator Clip two objects to the MaKey MaKey board. For example, you and an apple.
When you touch the apple, you make a connection, and MaKey MaKey sends the computer a keyboard message. The computer just thinks MaKey MaKey is a regular keyboard (or mouse). Therefore it works with all programs and webpages, because all programs and webpages take keyboard and mouse input.
Who is MaKey MaKey For?
Artists, Kids, Educators, Engineers, Designers, Inventors, Makers... Really it is for everyone."
More info at KickStart Makey Makey