CONCEPT BOOKS: Concept books deal with thoughts, troubles, and ideas in a creative manner that each amuses and teaches youngsters in the kindergarten to . grade range. Entailing a particular idea, that's then increased, they can discuss and illustrate fusion rise keto such subjects as what's time, what's the difference between huge and little, what is rain, in which do animals sleep at night time, and in which does the solar go after darkish.