So me and and my sister played this as kids. If you'd asked me a few years back, I would have swore up and down that we had invented it.
Apparently its a big thing in some places but before the internet, I had no idea anyone else played it. I thought it was just a thing my sister and I did.
Talked to some folks at work; same thing. They played it as kids with siblings but that was it. Never discussed or even mentioned outside the house.
Is it some sort of genetic memory or independently reinvented across the world?