He was so happy with his costume he wore it all day (the day before and the day after) pretending he was Mario jumping around and running with his Koopa shell. Even the mustache didn't bother him.
It was neat to hear people say "Look, it's Mario" when he walked by. I kept telling him he should say "Yes, it's-a me, Mario" or "Mama mia!" but he wouldn't go for it.