Alexandria is getting smart when it comes to her little brother.
We were at my parents' place over the Easter long weekend for a few days. They have a wall of storage and cubbies. Alex and Zach like to play in the cubbies. Alexandria was in the cubby and Zachary wanted to join her. She didn't want him in there with her. After briefly struggling, Alex went under the bench and said, "I'm going to my own cubby over here." She then waited for Zach - who she knew was inevitably going to follow her - to want to be in that one instead. After he went for her "new cubby" she happily got to have her original spot back. And everyone was happy. Smart girl. ;)