marble run
noun1
A toy consisting of a track with bends, obstacles, etc. that marbles can be made to run down.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
noun
A toy consisting of a track with bends, obstacles, etc. that marbles can be made to run down.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
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