Rolling

My mom called me Tuesday night and told me she was looking at my brother Dalin's baby book and said he started rolling at 2 months and that Colton was behind. I said no I think Dalin's just advanced and that Colton would probably roll by Christmas since he has been trying. Wednesday when I was babysitting I laid Colton on the floor and within like ten minutes he rolled from his back to tummy. We are still working on tummy back he hasn't quite mastered that one yet.