This is a 3D representation of a multiplication table: The higher the value, the higher the cube.
Back to school with OpenSCAD / Customizer!
I just had time for a short test print, and the numbers are good readable.
-Print a full 10x10 copy!
Added a few more Options to customize even more!
Fixed a minor glitch in the script that lead to unprintable STL files.
Print it out, highlight the numbers with something like a sharpie or a similar product (nail polish should also work).