Sofia realized last night that she can roll onto her side. So far, her left side only. James knew it was coming soon and last night she finally realized the only thing holding her down was her own back leg. She rolled both legs up to her chest, turned, and Voila! she was on her side grasping at the toy duck I was dangling just out of reach. Like any new trick one learns, she kept practicing and soon perfected the half roll.
We tried to switch directions and have her roll the other way, but it got a little frustrating for Sofia. She still understood the 'best practice' of pulling both knees up to her chest, but then her body would still roll the way she had already mastered (taking her further away from the toy she wanted).
Mommy and Daddy are very proud and a bit horrified that we haven't begun baby- proofing the house yet.