Intended for very young audiences, a repetitive format and simple text and illustrations  teach basic concepts, while also inviting young readers to delve more deeply into those concepts.  It begins by showing an apple opposite an armadillo, asking the simple (and seemly obvious) question, “Which is round?” When the reader turns the page, the same question repeats, accompanied with, “What do you think?”  Only this time the apple has been eaten down to the core, and the armadillo is curled up upon itself in a round ball.  Similar examples examine concepts of bigger, longer, faster, higher.  And the book concludes with asking whether an apple or a watermelon is red, whole green and red fruits on the first page are followed by fruits cut apart to show the white and red insides when the page is turned.  A great tool for developing observational skills and creating discussions around comparisons.