Barron's "Animal Flappers " books are filled with bright illustrations of funny, friendly animals that spring to life with flaps to lift and. amusing surprises hiding behind each flap. Each book's final spread presents a spectacular pop-up illustration that is certain to delight little boys and girls. In " Wake up, Farm! " the sun is rising and the farm animals are waking up. First to awaken is the rooster, and when kids lift his flap they'll see his call: " cock-a-doodle do! " Next, the cow wakes up, a friendly fox appears from behind a bush, and sheep and ducks all wake up, as well. The book's final two-page spread presents a pop-up picture of all the farm animals waking up together.