I just walked back into the room where Emily and Sophie are hanging out, and the following conversation ensued:
Emily: Oh, hi Daddy!
Me: Hi, Emmy
Baby Sophie: coo
Emily: (excitedly) I just gave Baby Sophie a little haircut, Daddy!
Me: Oh! That's interesting, Emily, why did you do that?
Emily: Because she didn't already have a haircut yet today.
Me: Oh, I see. Well, Emily....[insert lesson on appropriate use of scissors]
Fortunately, she only cut one or two hairs that were "sticking out".