Added: 4 years ago
From: ArgonneNationalLab
Views: 5,402
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  • nice but could be better quality

  • that's my brother at 1:04 on the left

  • first, marbles are hardly ever used ball bearings are. Second, ball bearings are smooth and the perfect size for a machine which has a size limit. third, anything larger will shake the machine causing steps to go off prematurely, and fourth, they are easily obtained

  • i'm no rube goldberg x-pert but why do all of them envolve a marble. If i was a judge, i would take pionts of origanality cuz everyone uses marbles. it would be nice if someone didnt use a marbe and used something else that rolls.

    yea 2nd comment!!

  • If you had all of the machines, full length, you would have more comments, and ratings, but it was okay.

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