Me, I, or You?

Have you ever tried to teach a two year old the proper use of I, you, or me? This morning Jim and I were having a conversation with Matthew and he was using "me" instead of "I". We were trying to correct him and we would tell him to say "I" and he would come back with "you" because he thought we were talking about ourselves. I don't know how to explain it, I guess it was a "you-have-to-be-there" moment, but it was so funny. We never really did get it all straightened out with him!