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](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,