Rolling ball sculpture

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.

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

A version where marbles compete in a race to win is called a marble race.

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