If you have never heard of marble machines, let us explain you a few things about them. Marble Machines are extremely complicated devices that automate the process of playing with a great number of marbles. This automation might lead to some increase in productivity, though Martin Molin of Wintergatan found a better usage for this incredible instrument. The machine he has invented uses human power and hundreds of marbles to play the same way as percussion, bass guitar, xylophone and other instruments. Watch and prove it with your own eyes!