This is super common though. I mix up my kids’ names on a daily basis, it’s not because I don’t know who they are or can’t tell them apart. They do think it’s hilarious when I mix them up with the chickens.
The common factor is that I am usually saying the same mindless stuff to my kids (and chickens), like “get down from there” or “move out of the way please” or “stop making so much noise”.
You can definitely take the train from Italy to Sweden. This summer we took the train back and forth from Denmark to Italy, with children.