Book Description: Climb aboard a backhoe, watch as building is knocked over, and learn how a road is made. Take an up-close look at the wide variety of machines that are used on a building site. Looking at a variety of machines with a wide range of uses, the Machines at Work series explains how vehicles help people on farms, construction sites, and other busy places. Each of the books answers questions with bright, interesting photographs of machines in different situations to explain how they work and what they do. Complete with plenty of amazing facts on this popular subject, the Machines at Work series is sure to be a hit with young readers and machine enthusiasts. Vroom-vroom!