Moving around

Hannah rolled over for the first time yesterday. We put her on her stomach and then she sort of curled up in a ball and suddenly she was on her back. She seemed so surprised she didn't know what happened to her. We tried again but she couldn't quite get it. I am sure in the days a head she will figure this out quickly. Now I have to be vigilant when I lay her down anywhere so she does not roll off. Can't believe how fast they grow up.