Y'all need to put meanings for the abbreviations here, ****ing took me ages to realize what that was, yet, I googled it to be sure
It relies on child's diet and activities. A child is a child to explore the world. If he's gonna sit and do nothing, he'll have more things in his account that he will want to explore. And when he explores all of them together, there's over-excitement about all of it. If a child explores the world, does activities, communicates, he'll be tired by the end of the day and will naturally urge for sleep himself.