My nine month old dd is showing no signs of being about to crawl anytime soon. However she is pretty mobile and can roll across a room if she wants something. The problem is that since seven months she will go Straight from sitting to flat on her front with ease, and then the screaming starts. She used to be pretty keen on tummy time but once she could sit up it would no longer be tolerated. I'm not bothered about her not crawling but could do without the screaming to be sat back up every five minutes. Any ideas about anything I could do to reduce her frustration? She's very flexible but can't seem to get her knees underneath her in the classic crawling pose.