Edit (11/24) - Made a version with tighter tolerances, glueing shoud not be required anymore with this one. You can pick version for yourself (depending on a 3D printer and settings).

These things can be inserted into the phone stand to make it nicer and more interesting.

You can print it in PLA with 0,4 mm or smaller nozzle and <0,15 mm layer height. Different colors make various results. You can glue it afterwards, however it does have pretty tight fit.

Please excuse low print quality of the phone stand (small piece of old, wet filament).