does anyone have any experience of taking a three year old on an overnight flight? did your child sleep on your knee or curl up in their own seat? what worked and what got you through the flight? our flight time will be at least ten hours - the airline has a poor reputation for delays so it may be longer - and i want to do everything possible to reduce the pain for everyone. it will be the first time we've attempted a long flight with our fairly boisterous DS.