My DD is 9 months old and is occasionally rolling front to back. She also hates tummy time. She can now sit really well and shuffles a little on her bottom. She is starting to pull herself forward into the crawling position and is trying to pull herself up to stand. They do all develop differently, I have been taking DD to a chiropractor and that had helped a little. She had a stiff neck which has been resolved. The chiro is adamant about the process in which they develop, but I think DD is just going to do it her own way!!!