Braille cube

This is a prototype of ongoing Braille educational toys development.
It's simply a cube with letters. Design allows to print six identical cube sides and pins for it. Next, pins are used to form Braille font letter, after that cube can be assembled and glued. Or, without glue it can be used as puzzle.

**WARNING!**
Use SIDE_01_07_16_release.stl if you experience issues with printing quality - this one has 0.25mm error included.
If your printer doesn't have such problems - use SIDE_07_07_