World of wonder. Big machines

Presents information about bulldozers, their parts, and the work they do in construction and describes the help they provide to armies and soldiers. Includes instructions for building a model bulldozer, color photos, a glossary, and an index.

Describes the parts and function of an excavator. Includes an activity and sources of more information.

Details the characteristics of dump trucks and examines how they function and how they are used. Includes full-color photographs, an activity, a glossary, and sources of more information.

Photographs and text introduce readers to tractors, describing their features and showing what they can do.

Explores the characteristics of jumbo jets and discusses how these massive vehicles are able to fly. Includes full-color photographs and a glossary.