Tummy time.

The latest in Maureen's bag of tricks is rolling over in bed and sleeping on her stomach - new last night. We knew the night would come, because she has been sleeping on her side, with her neck crooked back. All it took was a little more umph and bam, on her stomach.
She is gaining a great deal of strength - she can prop herself up with her arms when she's on her stomach, and she can also get her knees under her while on her stomach. She's not yet able to coordinate the two to start crawling, though. But it's only a matter of time.