I have always been intensely jealous of musicians.  The upright bass holds a particular allure for me.  I finally got it together to take lessons, and a few months in, I found myself building one instead of practicing.  I never learned to play, but did wind up with a very interesting instrument that other people can play. 

Materials:
Upright bass parts (neck, fingerboard, scroll, bridge), cooking pots, candy dish, table leg, chair leg, ash tray, pipe, pipe caps, circular saw, espresso machine.