Math Spinner
thingiverse
My 4 old kids start to learn about math operation so I search something to make math more fun. Found "Math Spinner" from http://www.thingiverse.com/thing:452651 is very interesting. So I made my own "Math Spinner" with angle step lock so It doesn't freely rotate. Hope you enjoy my design. Print Settings Printer: Flashforge Creator Pro Rafts: Doesn't Matter Supports: Yes Resolution: 0.2 mm Infill: 20% Post-Printing Add some grease to make it spin easier,
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