A simple keychain or key tag with a special slogan.
Bed temp: 60
End temp: 200
You can adjust the size according to your liking. Make sure not to make it too small so that you don't miss the details.
Nothing else to worry about. I want to try printing the top part using a different PLA color. It should come out much cleaner than painting it.
I've also found a really good paint marker. I'll use it on few prints till I get the hang of it.