Just like that. I have a four year old.
It hasn't completely sunk in for me yet. Or for Joe, who keeps insisting he's "still three."
It has been a great year for Joe. A challenging year for us parents, but a great year for him. Our speech delayed child is talking our ears off (read: arguing with us about every.single.thing), asserting his will, and learning new things everyday. Joe is funny, smart, and caring. He says "I love you, Mama/Daddy!" and "I love you, Maggie" all the time now. But he's also very stubborn. He is a Taurus after all. He's untouchable, like Eliot Ness.
And he's a great big brother. He loves his little sister. And she loves him too.
(Note: He is not allowed to carry his little sister, but he ignores this rule and carries her around every day, despite our scoldings. And she really doesn't seem to mind.)