He wants a Superman birthday party. He jumps around the house, shooting imaginary webs while claiming that he's Ultimate Spider-man. He stalks the corners saying that he's Batman. He throws amazing temper tantrums when upset, and finds his face when he's embarrassed. He loves to give hugs and fight with his brothers.
I vaguely remember being four, playing with the neighbor children, wondering when I would go to school. I remember watching PBS shows like Sesame Street and Mr. Roger's Neighborhood (and being banned from watching the Electric Company because it made me too wild). I remember watching Star Wars in the theater and wanting to be Luke Skywalker.
Rowen is just now entering into the realm of retrievable memory. He is starting to understand the world and himself. He will start to remember his birthdays, his goals, and his dreams. He's no longer the baby. How can he already be four?