Was going to buy myself a ukulele but this looks infinitely more practical.
Swedish musician Martin Molin has long had experience with esoteric instruments like the glockenspiel, traktofon, or Theremin, but he may have topped his musical prowess with the invention of his own new instrument: the Wintergatan Marble Machine, a hand-cranked music box loaded with instruments
Source: This Ludicrous New Instrument Makes Music with 2,000 Marbles | Colossal