One of my twin toddlers will easily, happily sleep 2-3 hours a day (they are on one nap a day). The other is down to 1-1.5 hours, with a 2-hour nap thrown in once in a blue moon. They share a room--we used to separate them, but the early waker would scream to wake up his brother...and now, the one who wakes early, well, he's hard to contain. He really, really wants to wake up his brother. What should I do with him in order for his brother to get the sleep he needs? They go to bed at the same time and my early nap waker is generally an early morning waker, too. Separate room is not an option.