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.

A simple wooden toy marble run
A version where marbles compete in a race to win is called a marble race.
Toys
People make toys out of Rolling ball sculptures.
World records

People watching a kinetic sculpture by George Rhoads
The tallest rolling ball sculpture in the world, at 22 metres (72 ft) tall, is named the Energy Machine, and located in the Hong Kong Science Museum in Hong Kong.[1]
References
- Knikkers, Jelle (October 28, 2015) "Marble Run Records" Jelle's Marble Runs Accessed:December 31, 2019
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