Will you brush mommy's hair?

Katelyn is 16 months and she loves to pretend play or interact with her dolls and toys. She likes to change and put a diaper on her dolls and they ALWAYS share her sippy cup with her. She loves to brush their hair. The words are really coming now. I need to really pay attention. Sometimes I almost miss she has started to say a new word. "Brooke" is her favorite word right now, but it is more like "Book." "Diaper" was a new one today.