Our little boy has figured out how to roll over. He's been going from his back to his front for a couple of weeks now and a few days ago figured out how to go from his back to his tummy. We put him down for bed on his back and find him in the morning on his tummy sucking his thumb. That's the same way Aliya sleeps. We can definitely tell they are siblings. I think Aliya taught him how to suck his thumb!