I can't hardly believe that my baby is four months old today! She is growing up so fast. She a pro at rolling over, although she hasn't master the roll from her stomach to back yet. She is super amazing because she sleeps through the night! My other babies I had to help them sleep through the night, and they were much older, probably around seven months old. But this one did it on her own! She usually goes to bed around 7 or 8 in the evening and wakes up anytime between 6-8. I love it, let's hope she keeps it up!