Wired:

The internet is no stranger to ridiculously complex attempts to make music with technology. But this might be one of the most purely spectacular attempts yet to take something which is now incredibly easy, and make it virtually impossible to comprehend.

The Wintergartan Marble Machine, built by Swedish musician Martin Molin and filmed by Hannes Knutsson, is a hand-made music box that powers a kick drum, bass, vibraphone and other instruments using a hand crank and 2,000 marbles.

This is utterly insane. I love the unpolished nature of this thing. Almost as if you could make it yourself using scrap would and nuts and bolts from your garage. But trust me, there’s no way you could. Just watch and appreciate not only the music being made but the wonderful Rube Goldbergness of the machine itself.