I'd switch seats if they were like separated from their parents or something so they can sit together.
but just switching so they can have a window seat, no. I like window seats too.
In fact i would be offended by the question, because i make it very obvious that i'm enjoying my window seat. I have the window cover open the whole time and i am actively looking out the window the entire flight, thinking about flat earthers
I've seen some people who get a window seat, promptly pull the shades down, and leave it that way the entire flight, Ask them to switch seats.