I just found this. Good article. Thanks for posting it. It mentions a lot of things that people may not even think of. Like the light factor, or when they have it dark for sleep. This I have to admit that I am not good about. I spend a lot of time with them, and have so much to do when I get home, that I often keep them up later than they should be. I'm going to watch that, and make a time for lights out, and stick with it. I'll just have to plan my time better. Thanks for the reminder.