How to build a programmable music box?

I came up with this concept for a small music box for my little cousin's birthday where one could fill in the boxes on a sheet of graph paper and feed it into this hand cranked music box. As the paper passed through, the graphite pencil mark would create a circuit to produce a tone depending on where it the box was filled in on the piece of paper. How could I create these circuits so each box on the graph paper would create a specific pitch? Preferably i would like to do this with no circuits or modulators or whatever, I just need to know how to make a small homemade speaker produce a specific pitch when the circuit is complete.

Thanks! Sorry if this was sort of ambiguous and please ask if anything is not clear or if I'm breaking any rules.

Submitted March 03, 2015 at 09:49PM by crimsonincarnate http://ift.tt/1GfTpIz