Rolling ball sculpture

"Marble run" redirects here. For other uses, see Marble (toy).

A rolling ball sculpture (sometimes referred to as a marble run, ball run, gravitram, kugelbahn (German: 'ball track'), or rolling ball machine) is a form of kinetic art – an art form that contains moving pieces – that specifically involves one or more rolling balls.

A version where marbles compete in a race to win is called a marble race, in which the marbles go through simple or complex labyrinths, seeing which one is the winner, or even loser. The YouTube channel Jelle's Marble Runs has popularized this idea over the years, especially gaining traction during the COVID-19 lockdown of 2020. Through his video series dubbed "Marble League", also known as the "MarbleLympics", he recorded and uploaded marbles racing through tracks, with them resembling Olympic sports and were recorded in a sports broadcast-like manner (a commentator to educate viewers on what's happening, crowd noises and other SFX as if it's a real like sporting event, etc).

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