Who's on first?

Colt and I were walking down the street today and had the following conversation:

C: I'm 4 years old.
N: No, you aren't!  You are 2 years old.
C: I'm two years old (intense look of disbelief)??????
N: Yes. Can you say that?  Say I'm two years old.
C: I'm two years old.
N: That's correct. You are two.
C: Well, I said I'm two, but I'm really four.
N: NO. You keep saying you are four, but you are really two.

Long pause

C: So, I'm three years old.

Charlie Brown face.