Bicycles are typically seen as moving, but quiet things and musical instruments are typically stationary. Over the past two weeks, our group aimed to subvert both of those ideas with the music box bike. When in motion, the music box bike uses the motion from the back wheel to spin a series of gears attached to the bike frame. The final gear, a whole bicycle wheel, spins a studded cylinder which plays a kalimba attached to the back of the bicycle. We added in some gears for aesthetics, and gave it a paint job to match our theme.