They aren't trying to be anything or anyone. They aren't worried about how there bodies look or if there makeup is just right. There focus isn't always on the camera. Candid shots of children just amaze me. We were all like that once, living with out a care, not always worried about what others will think. What happened in our lives to take that away? Why as adults do we worry about such small and trivial things.
Children in my opinion are the only people that love themselves totally and completely, they just want to get up and have fun everyday. No Worries.No Cares.No Plan. Just living.