Take a look inside the world's biggest truck and other powerful machines! The Caterpillar 797 has tires over 13 feet high and can carry weights of up to 360 tons — the equivalent of 144 pickup trucks! This mechanically minded coloring book reveals the insides of exciting vehicles, including the Ariane rocket, a snowmobile, submarine, backhoe, and other machines. More than 20 cutaway illustrations expose the inner workings, and brief captions identify individual parts.