Here is circuit bending diy sound box created from five chips from electronic toys :) and several additional ICs in filters and triggers which inspired the creation of SoundScaper app.
click on image to enlarge
Would like to know what is "circuit bending"?
Know more about circuit bending
Interested in circuit bending? Here an excellent guide to start:
Circuit Bending Tutorial
Or download app for iPad to figure out what it looks like:
SoundScaper - An experimental sound mini lab