Design a circuit that you can turn into a CrackleBox. A crackle box is similar to Circuit Bending, a creative/destructive use for old electronics.

Here are a few links to get you thinking

http://www.crackle.org/CrackleBox.htm

http://www.flickr.com/photos/tags/cracklebox/

http://www.flickr.com/photos/fibra/198675042/in/set-72157594259456576/