For example, what kind of story would Geralt the Witcher tell his kids? “Once upon a time there was some normal everyday shit that went how it always goes”?
Must be the equivalent of realworld kids saying “Daddy tell me the story about the Tesco delivery again! The one where they forgot the 2L bottle of Pepsi Max!”
Maybe they would make up stories about travel underground, off planet, underwater, quite a bit like Jules Vernes did for us.
Assuming the magic is powerful but limited in scope, there would still be places beyond reach.