My buddy and I were just talking tonight about sticking electronics inside of a Pez dispensers. Coincidentally, I came across this link for a PEZ dispenser turned MP3/WMA/OGG player. In fact, the creator managed to strike up a deal with Pez Inc. and will market this as an actual product. Now all that's left to do is figure out how to make it dispense candy and music.
No Longer Invisible [The Pez MP3 Project]