I've been thinking about this for a while. When my baby starts rolling around, and/or crawling, how do you stop them from falling off the bed when co sleeping? I have a next to me on my side of the bed (which she refuses to sleep in) but obviously that only goes up to my hip, so if shes moving around, what's to stop her going down slightly and then off the edge of the bed? We have quite a high bed too, with no option to put it on the floor!