I have two little guys who sleep in the play room. I invested in black out curtains. I run the washroom exhaust fan to cut down on noise, and I have a curtain that separates the room. I find that between the fan and the curtain, they babble a little less with each other, get bored faster and fall asleep faster. One of these little guys wakes almost every day half way through nap, cries for 5 minutes and then goes back to sleep. The other little guy likes to wake early and babble and laugh. I find after being consistent with them they have gotten much better. The one who wakes learned how to self soothe instead of crying for a long period, and my babbler does so quietly and doesn't disturb the other boy.