Meet the MaKey MaKey kit: an innovative product that turns everyday objects into touchpads. Designed by former MIT students, the device can replace 11 computer keyboard keys and seven mouse actions using a microcontroller-powered circuit board and a set of alligator clip cables. How can you use it? Just squeeze your banana to play a note on a digital piano. You could also play games with it. Pencil graphite, finger paint, lemons, coins, and even plants work. Think about all the possibilities here.
MaKey MaKey is fun to use and makes a great gift for kids, designers, and inventors. It sets you back under $50 at this time.