Another interesting thing to do with a CNC, make ASCII art in halftones with it. Basically you use the CNC to “draw” the artwork on a board that is painted one color (or an MFD board). I have seen this in the past with halftone pictures, but this is a first with ASCII for me.
http://www.evilmadscientist.com/2014/another-ascii-tie-fighter/
http://www.evilmadscientist.com/2012/cnc-halftones-with-ascii-art/