that coat is for a baby

This morning when I was getting Joseph ready for school we had this conversation:

me: "let's put on your coat."
J1: "I don't want to wear that coat. It's for babies."
me: "Joseph, this is your coat."
J1: "It says right there that it's for a baby!" (pointing to the BabyGap tag.)
me: "well, um, what does it say right underneath it?"
J1: "the number 4."
me: "Right. This is the coat you wear when you're 4."
J1: "But I would like to be 10."