Brian and I thought that Sydney would first roll over from her stomach to her back because we thought that would be easiest. We have also been helping her roll over that way by putting her arms really close together so she looses her balance and "rolls" over. But for the last 2 weeks she has been rolling to her side when we place her on her back and then today, she did it! So in this video she is already on her side, but she gets herself there from the back-lying position.
She did this several times today! It was so cute, the roll right after this one, she let out a big yell/scream right after she finished as if to say, "I did it!"