Rub the blank space on each page of this book with the tip of a pencil and find out which bugs bore through woods; which large, hairy spider living in warm climates can survive more than 25 years; and what long, slender bug looks like a tree twig. Answers to these and 13 other nature-related puzzles are revealed by the pencil rubbings.

Educational activity book contains 16 different "invisible" pictures that appear when children rub them with a pencil. Illustrations answer such questions as: "How were pharaohs buried?," "What does the Sphinx look like?," and more.

Images of a Gila monster, prairie dog, roadrunner, and 13 other creatures become visible when blank spaces on pages are rubbed with a pencil tip. Captions.

Twelve creepy crawlers with a lustrous metallic shine include a lady bug, gladiator katydid, and praying mantis. Identifications.