So, my 5 week old DS can roll tummy to back already and hsd been doing so since 2.5 wks...all my kids hit milestones early but he beat his brother and sister with this one! Anyway, issue is whenever we try tummy time he just rolls over. He had a strong neck and back anyway and can hold his head up but I still think tummy time is important but can't get him to stay in position. Any ideas? I dread to think when this one will be walking! DD was 9 months and that was bad enough.!