4 yr olds apparently wield a lot of power over 2 yr olds. Case in point: we were at the playground the other day, and I listened in to their conversation.
A.: "BR, you can't climb up that ladder! It's too dangerous for little buddy boys!"
BR: "Ok, Ah-mah-ree. How about this one?"
A.: "No, not that one either. No boys allowed!"
BR: "Allright, I'll just go over here, then."