The paper marble run comprises 350 anti-prisms built, 332 tricks and parts, and about 200 metres of track, which all took ... together to make it the largest marble run in the world.

[Matthais] used his pantograph router and a jig that cuts the wood for marble inputs on either side. After taking his creation to a hackerspace for some very large kids to play with, [Matthais ...

The criteria for producing the world’s largest marble mosaic portrait was that its height should be at least six metres and that every piece used be marble with natural calcium carbo- nate content.