Someday, SOMEDAY, I want to write a short one-shot tabletop RPG featuring form-changing robots, to run at a convention. I could have little toy cars for each of the players to fiddle with. Maybe commission some simple art of what each bot would look like. Or better, line art of heads that I could flat fill with color later, so it's not too tied to the toy cars. https://awoo.space/media/MObs3XGoUmP2zmOnpnw
What system, and what plot? Fate or Savage Worlds, if I can learn enough to GM those, might be generic and useful. Apocalypse World hacks I've heard are super fun, but no experience.