The trees and shrubs with their hard wood and bark we find extensions of the mineral kingdom in to the realm of living things. Leaves and blossom grow from the hard stalk of trunk and branches as though from the soil itself, wood is hardness like the mineral and when it rots it falls away into the crumbling substance like sand, returning back where he belongs. Those kind of pictures nourish the child imagination as well as inform him, they speak directly to his feelings, lead him into new warm connection with the world at a time when his developing ego most threaten to cut him off and shut him up inside himself, this picture of natire is curative for the child.