Rolling over

So, it's begun. We can no longer turn our backs on Samuel when he's on the couch, changing table, or even on the floor. He is in the stage where he just wants to move and touch anything he sees around him. Yesterday he rolled from one end of the living room to the other. Last night I would put him on his back to play and within 20 seconds he was up on his tummy...crying, because he didn't want to be on his tummy. But, I would put him on his back again, and he'd just roll right over to his tummy. Crazy kid!