About this 3D model

Changes by me AMS Version of Math Spinner by FunFunBoy Made the numbers as black inlays and matching colors for numbers, signs and base. Description by FunFunBoy 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. Post-Printing Add some grease to make it spin easier,