Last night I put Mia and Jack down in the middle of the bed on their backs, Tom was getting them undressed and I was getting the water in their tub ready for bath time. A few seconds later, Tom came and told me to come look at Mia. She was laying in the middle of the bed...on her belly. I thought he helped her but apparently, she rolled right over herself, using her big head for momentum ;)
Actually, she has a very tiny head compared to Jackson. Poor Jack Jack.