Solarbotics Perpetual Motion Marble Kit $32 at ThinkGeek

$32 $35
Today only. ThinkGeek has the Solarbotics Perpetual Motion Marble Machine Kit for $35 - 29% off with coupon code FROGGER [Exp 2/29] + $7 shipping = $32 shipped.

This DIY kit has everything you need to build a machine that moves marbles up and down a twisty slide with solar power.
$32 retail: $35
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swreynolds
swreynolds
Ben's cred: 1300
Posted 02/29/2016 at 05:58 PM PT
Posted 02/29/2016 at 05:58 PM PT
What about the bird dunking its beak in a small pool, or a radiometer?
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