Caitlin rolled over!!

I put Caitlin down for some tummy time yesterday and she very quickly flipped to her back. I figured it was a fluke because I put her down a little on her side. Well, today she had been on her tummy for about five minutes. Angela and I were on the floor playing with her and she suddenly pushed herself over again! I captured two photos at the very end. Wonder if she will be a 'roller' like her sister was!!