Tonight I set Molly down on her belly while I changed the laundry. She pushed up high on her arms and tip, tip, tipped right over onto her back! I haven't been great about tummy time with her because, with her easy going nature, before she would just lay there, head down and the expression on her face as if to ask "Really, Mom, really?" But I guess she has been ready to move a little more! She's rolled several times since and the big kids all get a great kick out of her new trick.