Thansk for the reply! Ours are usually awake 1.5 or 2 hrs so they're right on track. I guess I was just wondering if it's specifically BAD to keep them up longer, or if they do ok, is it ok? The only time they are awake longer than 2 hrs is if we go out, like to a mall or something and they're busy looking at all the sights! But they don't get cranky so I guess it's ok!