Playdoh/clay letter stamps made in OpenSCAD. STLs for the letters A, B, and C are included as demos, but you can modify the "text" variable in the SCAD file to be whatever character you want.
No support material should be needed. I used 20% infill and 0.15mm layer height, but you can choose whatever settings you like.
The author marked this model as their own original creation.