Also, your first two are close together in age, like mine who are 15 months apart, so it was so much easier to get a routine going, I remember in the winter months they were bathed and in bed for 7pm. Now, we have "the" princess (kidding) but if the older ones are bored, they will fire her up, as well as friends at the door, on the phone, the music, the guitars etc etc, I wouldn't want to miss out either, if I were her, in fact my older sister tells me I was her! I know we have found it sometimes easier for us to let her have her fun, then other times it has felt like a pain, so to be fair to her this 9 O'Clock thing works, and is a consistent agreed rule.