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 " Hello Jungle " Mommy Tiger's baby cub is hiding behind jungle foliage. More playful jungle animals appear on following pages, including monkeys, a parrot, and a grinning snake. When kids lift each jungle animal's flap, they'll see words indicating the sounds the animals make. A final two-page spread presents a pop-up crocodile with great jaws that open wide.