Here's a great spot of recycling – using old game cartridges to make musical instruments – the work of NESharmonica.
As the name suggests, these are old Nintendo NES cartridges, but mixed with a Hohner harmonica tuned to the key of E to produce the novelty instrument. They even throw in some instructions and sheet music, plus the original circuit board that features the game. Well, you never know when nostalgia takes hold.
Take your pick from a variety of games (including the Zelda pictured here), with prices starting at $24.99.