Wintergatan - Marble Machine (music instrument using 2000 marbles)

When Swedish musician Martin Molin set out to make a musical instrument that runs on marbles, he figured it would only take a couple of months. The process turned out to be a little more complicated than he initially anticipated. Now, more than a year later, Molin has finally unveiled his finished piece: an enormous hand-made music box, powered by a manual crank, which makes music by using about 2,000 metal marbles.