Train boy

Thomas wore his conductor's hat most of the day today, and when I picked him up from school he said, "I'm not a pirate. I'm a choo-choo train."
Later, while he was playing at home and getting irritated with his toys I heard him say, "Come on! You're kidding me."
I then went in the playroom to take his picture, and he said, "No pictures. Do you understand?"