The idea of no internet at all, or an internet that was only text-based and you couldn't buy things on it.
The idea of no cell phones, or cell phones that were huge and only for rich people and FBI agents.
Gasoline-only cars (I'm hoping).
How Trump got elected president.
Probably a lot of the cultural trauma caused by things like WWI & WWII, since pretty much everyone who remembers those will be dead (already happening with WWI). They'll read about it in history books, but it's not the same as hearing it from your grandparents, since I'd be the grandparent and I wasn't alive back then.
Re: What is something you think kids two generations from now just won't understand?
The idea of no cell phones, or cell phones that were huge and only for rich people and FBI agents.
Gasoline-only cars (I'm hoping).
How Trump got elected president.
Probably a lot of the cultural trauma caused by things like WWI & WWII, since pretty much everyone who remembers those will be dead (already happening with WWI). They'll read about it in history books, but it's not the same as hearing it from your grandparents, since I'd be the grandparent and I wasn't alive back then.