Want to get some sort of sleeping bag thing for kids so that we can sleep more people, esp. over Christmas and New Year. We were thinking about these types of bed. I see you can get the inflatable ones with a soft headrest for between £18.00 and £29.00. Has anyone got one or have any advice as to which is the best to go for. Dont mind if we have to pay a bit more, our children are 4.8yrs and 2.7 yrs. I was wondering whats the maximum age/size child that can sleep comfortably in them....If I know it will last for a few years I may pick a design/character that will have a longer appeal to them.