What's a song or rhyme you remember incorporating within a game when you were a kid?

They were used either to start a game, a process of selecting who was “it” generally speaking. Or they were part of the game itself, hopscotch or skipping for example. “Dip-doo magga zoo, who’s on not you!”
No, I haven’t gone mad, that’s one I remember. How about you then? Oh & don’t forget, play nice!!