This is my take on the classic “15” sliding number puzzle. I included the “0” for completeness, but it easily pops out so the remaining numbers can actually slide. There are two versions: raised characters and recessed characters.
It prints fine without supports, but some light organic tree supports make the empty square print just a bit smoother.
I added .3mf files with my settings, which have a .2mm first layer, .2mm remaining layers, 3 perimeters, and a Hilbert curve top surface. I also slowed the perimeters to 150mm/s to help with the tight tolerances in the model. The model is designed with .2mm increments, so it prints very clean at those layer thicknesses.
The author marked this model as their own original creation.