Braille educational cube Free 3D print model

Segmented cube on a base for study of Braille letters with children of 4 years old and older. I've printed this cube on Wanhao Duplicator 10 (PLA only): speed 40, Wall thickness 1.2, Filling 20%. Making the fixator my printer failed twice, so I replaced it with a paper clip. Fixator is an optional detail (by printing the base, you will see that the shape is not entirely cylindrical)