Elements on each page are textured for greater interactivity, and the book has two fun gatefolds-one that flips down to reveal a plant's roots, and another that folds out to show a sunflower following the sun.Written by Bobby George, cofounder of the Baan Dek Montessori, the Montessori series introduces young readers to key concepts by beginning with the concrete and moving to the abstract. With each book, young readers absorb age-appropriate information and gain a better understanding of the world around them.