A simple coin trap for either nickels or quarters, made in Tinkercad. Pause and insert a coin halfway through printing.
Featured on Day 1 of MakerHome: http://makerhome.blogspot.com/2013/08/day-1-coin-traps.html
UPDATE: This is now redesigned as a customizable Thing at http://www.thingiverse.com/thing:193941
Hacktastic blog: mathgrrl.com/hacktastic
Shapeways geekhaus store: shapeways.com/shops/mathgrrl
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