Practcing their rollovers

Peter and Patrick are very good on their bellies now. Now they can lift their big heads way up and free their hands from under them. When on his belly, Patrick very quickly rolls himself back on his back, thus conserving his energy --  lots of work lifting up that big head and practicing your crawling you know.

But poor Peter took a little longer to learn that trick of rolling back on his back and so at the beginning when he got on his belly, after awhile he would be struggling and  grunting, and sometimes having to rest his head before he can lift it up again. But now Peter caught on and he can very gracefully roll on his back expertly shifting his weight from his back to shoulder to hand and finally on his back.