So Henry came up with new words to say when playing Rock-Paper-Scissors. One of them is "Eee." Eee beats everything (except Ree). "Un" beats "Ree." So, as you can tell, why on earth would anyone say "rock"? If I say rock, then you could just say Eee and beat me. If I say Paper you can say Eee and beat me. If I say Scissors you could say Eee and beat me. So really I would have to say Eee. But if I have to do that, then you would say Ree. So I would have to say Un. But Eee beats Un.
So, as you can tell, these simple rules changes takes Rock-Paper-Scissors to the next level (albeit in reality it's still an A beats B beats C beats A scenario).
You can also say "Galaxy," which beats everything except Eee. You can also say "Nothing," which beats everything except Eee. If both of you say "Nothing," it's not a tie, you both get a point.
So with two other things that beat everything except Eee, the odds have shifted a little. Now you want to say Eee more often. Which means you want to say Ree more often. Which means you want to say Un more often. But if you say Ree or Un more often, then the other person can just say Galaxy or Nothing to beat you. "Nothing" beats "Galaxy."
Henry made up this version in 2nd grade during dismissal.