Henry is great about using his manners, often to comedic effect. He thinks that the word "No" must always be followed by "Thanks."
"Henry, it is time to go to bed." "No tanks!" "Henry, it is time to eat lunch." "No tanks mama"
"Excuse me" is another funny one. We were at the park yesterday and he wanted to pass some dogs. I always instruct him to give dogs a wide berth. He said "Excuse me doggies, Henry get past." If he gets stuck behind a crawling baby on the playground he will say "Excuse me baby" and wait for them to move.