This may be too simple a project for your purposes, but my experience a few years back while taking an Introduction to Machine Technology class along with a number of younger students (in their early twenties, perhaps aged 21 or 22) was that several of them decided to create aluminum signs or nameplates as their class projects. They milled the letters into blocks of aluminum or aluminum plate.
The Haas CNC machines were not available for our use at the time, but there were several Bridgeports outfitted with conversational controls (Accu-rite Millpwr) that could be programmed after a fashion. I remember that one of them did his own name in a fancy font and with some kind of geometric outline design. Another one made a F* You sign that would work well as a paperweight (even at that advanced age they were still little different from a bunch of rowdy teenagers). And another one made a PRNDL shifter panel for use on an older car.