A blue marble makes its way through these beautifully designed but hard to find Cuboro/Cugolino ball track blocks with the help of three red marbles and two large wooden balls. The chain reaction filled piece was created by the kugelbahn (marble maze) enthusiasts of Murmelwelt.de.

MoMA-worthy Cuboro and Cugolino marble run sets from Switzerland are hard to find stateside at affordable prices, but there are sometimes sets found on Amazon. We’re also fans of Hape’s marble run sets.

Next, watch Paul Grundbacher’s wooden marble machines, Turing Tumble, and Andrew Gatt’s Ultimate Paper Roller Coaster, an excellent DIY project for at home or in the classroom.

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