[NorthSouth Books] Explore an undersea world full of opposites in this board book from the New York Times bestselling Rainbow Fish series. Up/down, in/out, over/under, big/little, long/short… This glittering board book, filled with colorful images from Rainbow Fish's undersea world, is the perfect introduction for very young children to the concept of opposites. In keeping with the classic picture book story, The Rainbow Fish, the book ends with the most satisfying opposite of all—give and take—as Rainbow Fish shares one of his shining scales with a friend.