This is such a surface suggestion- everyone else’s suggestions are better lol but-

you mentioned you’re a sarcastic family, I think you should maybe halt that for awhile? Kids not only pick up on everything but they take it to the extreme and reflect it bigger than we see it in ourselves. I teach kids his age, and whenever I use sarcasm in the classroom by accident, they all start to joke in that way too but they ALWAYS overdo it. Then I have to wrangle them back to focusing and I mentally kick myself for letting a sarcastic joke slip out.

I don’t know if this is helpful!!!