Two icons of the twentieth century!
The Saturn V Apollo moon rocket - everyone who was watching remembers.
And the humble ball-point pen, introduced to the public in the early 1900s, became so ubiquitous we didn't even think about it - it was a part of the landscape, everywhere. But it seems to be fading in the digital age, as pocket protectors have given way to smart phones.
Remove the 3 structural supports from each part, and otherwise trim as needed. (Cura's auto-generated brim was not sufficient to prevent parts from breaking away during print, so I added these supports.)
Remove the ink cartridge from an inexpensive ball-point pen and insert it into the rocket's lower stage, leaving the writing tip exposed. Place the rocket's upper stage over the writing tip. Align the locking tabs, press the stages together, and twist to lock. Place the rocket's escape module over the writing tip.