Lloyd Alexander said this quote
“ Children may not understand all that's happening below the surface of a story. It doesn't matter. Because even though they may not be able to define or verbalize it, they sense there's something more than meets the eye; on an almost subliminal level, they're aware of a richness of texture, or meaning and emotion -- a richness that, in a great book, is inexhaustible. And the child may well come back to it again and again, perhaps long after he's stopped being a child. ”