This "Marble Machine" Instrument Is Captivatingly Beautiful
A Swedish musician has invented his own instrument called the Wintergatan Marble Machine, a hand-cranked music box loaded with 2,000 steel marbles.
As the devices cycles it activates a vibraphone, bass, kick drum, cymbal and other instruments that play a score programmed into a 32 bar loop comprised of LEGO technic parts.
The marbles are moved internally through the machine using funnels, pulleys, and tubes.
But don't expect to see many of these on the market as it took about two months to build and has to be disassembled to be moved.
Source: This Is Colossal