DS hated tummy time. I admit I didn't do it with him, especially since he learned to roll. DD2 was way ahead of him as far as neck strength adn lifting her chest off the floor. DD2 also sat a couple of weeks before DS. However, DS did beat her to crawling, by 1 day. He is also beating her at "cruising". So, I don't think tummy time, or lack thereof, made much difference.
9/24/10 at 1:38am