I am hastily straightening out the covers on my children's beds . Ruby’s bed takes little effort to pull together. When she sleeps, she hardly moves. Dylan’s bed has no blankets and half a sheet. Things were wild in there again last night. It was clearly another restless evening. Dylan has always been my most restless sleeper. Relentlessly curious, he tosses and turns throughout the night, waking pre-dawn. He spends most of the night awake and thinking. My husband and I are always in search of the next great thing that is going to “cure” him of this tossing and turning that often leaves him bleary eyed the next morning. We have invested a near silly amount of time and energy researching special blankets and sound machines and sleep masks and anything else we can think of. But all of this stuff circumvents the central issue: that he fundamentally views sleep as an extended length of time to swirl about in his own head about people and places he loves or misses. It is an...