R.D.
My daughters have always shared a room. They (still) wake up early because they are so excited to be together! Sometimes I will leave them little cups of dry cereal and some cups of water in there (they have a little table and chairs) so they can wake up and munch on something... they also know that unless they have to use the bathroom or there's an emergency, they do not leave their room until they hear everyone else moving around the house. They play pretty quietly, reading books, playing games, playing with WHATEVER is in there. It took some time to get to that point, but persistance really paid off. Best wishes!