Sarah is starting to coo and make baby sounds more. In the beginning she limited herself to grunting and crying. Also, Sarah now makes eye contact instead of just looking in our general direction. Her neck muscles are getting nice and strong. She'll often lift her head up when we are holding her so she can get a good look at us.
We decided that we would take pictures of Sarah every month in the same 12-month onsie. Here she is at a few days old followed by her one-month picture: