This topic is about “Your favorite make-believe game.” That’s easy! It’s Calvinball!
The rules of Calvinball are pretty simple.
There are no rules.
In essence, you are playing a game that is completly fabricated. The game can and usually does change at any given moment. If you are a miser for rules, this is probably not the game for you.
In short, Calvinball is pure, unadulterated, imagination.