...and the little one said 'roll over...!'

When Jackson was 3 weeks old I put him on his belly for tummy time, walked into the kitchen for a minute and when i came back he was on his back. I put him back on his belly and he did it again, 3 more times. He hadn't done it since, until a couple of nights ago so I grabbed my camera. He now rolls over every time i put him on his belly.