My son who is rapidly approaching 17 (dang) has always been a solid sleeper. Does not talk, walk, or even ruffle up his bedding. He lays down and that's it. My daughter who is soon approaching 15 (double dang) has from about 3-4 years old been found walking in her sleep, carries full conversations in her sleep, and is a nightmare to sleep next to (toss and turns, elbows, fists) ouch. Not really concerned at this point as she wakes generally in good spirit and refreshed. Mom and Dad...not so much
