Marble Machine is a Music Box that uses Marbles to play different Musical Instruments. It is one of the rare instruments that you can find in the group of Musical Instruments. It uses about 2000 Steel Marbles.
The Marble Machine is powered by a hand-crank and it works by raising steel marbles through the machine into multiple feeder tubes. These marbles are then released from a height using programmable release gates. They fall and strike a musical instrument below. The instruments include Vibraphone, Bass Guitar, Cymbal, Emulated Kick Drum, High Hat and Snare Drum. Music score is stored on two programmable wheels utilizing the Lego Technic Beams and Stud Connectors to trigger Armatures to release the Marbles.
Wintergatan, a Swedish Folktronica Band from Gothenburg use different unconventional instruments like the Marble Machine.