Enter this awesome tutorial on making a "wearable light organ"!
My first test of the idea was for a friends costume for a burner party this weekend. He's going as "Rudolf the Red Nosed Ravedeer" and of course, REQUIRES a sound reactive red nose! Being that the event is this weekend I didn't have time to order online, but you can get all the parts from RadioShack for about $15.
Here's the circuit:

And the final result (it's stuffed inside a plastic "ball-pit" ball):

And here it is in action.
If anyone is interested in making something similar for themselves and wants some assistance just let me know. I'm still quite new as an electronic hobbyist, so the mistakes (and mild burns) are still fresh!
