Doodle lines, play music!
Sketcha-mo-phone is an instrument which you draw. The further away your doodle is from your leads, the lower the values you will play.
It is a very low cost instrument to implement, you need only a few LEDs and resistors ( and a pricey arduino to run it all ).
The entire hardware side of the instrument (excluding my PC running CSound)
Our arduino and the circuit board
Our audio canvas plus the tool involved in its creation