Description: Mikes Marble Machine - YouTube
By Dennie Bomar
Pinned to Marbles board on Pinterest
Found on: http://ift.tt/1GV9OP4
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Electronics with Paper Circuits
Special Feature: https://www.bigzeta.com/ https://docs.google.com/forms/d/e/1FAIpQLSfQ72zWLjHIokVTYWaM49jADGiljAUdvFMv8YKrTQ5x-4cL...


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