Considering the number of parents now needing to teach their kids at home, I designed this simple model to provide a visual learning aid for addition, fractions, etc.
They also double as fun play cubes for robot making etc.
These could easily be changed to have additional pegs on other sides, if you are interested in this let me know.
Print should do fine without supports, print with the peg facing up.
The author hasn't provided the model origin yet.