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How to make a marble machine from cardboard

The #1 Rule Experts Say to Follow When You Forget Wet Clothes in the Washer Police investigate Rep. Nancy Mace 'spectacle' at ...
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Taking Cues From A Gramophone To Make A Better Marble Music Machine

[Martin] of [Wintergatan] is on a quest to create the ultimate human-powered, modern marble music machine. His fearless mechanical exploration and engineering work, combined with considerable musical ...