Hi, my 7mth old has now grasped how to roll over from his back onto stomach, although this is great in the day, apart from trying to change him that is (tips on keeping him still during changes would be great too), he seems to do it during the night and works his way up the cot, he's got a cold at the moment and cant breathe as it is, so dont like the thought of him being on his stomach, is this something he'll get bored of doing, or are we to keep going in to check on him throughout the night????