While one tractor sits on the grass, out of gas, increasing numbers of other vehicles, from two airplanes to ten bicycles, fill the backyard with adventure.
On discovering late Christmas Eve that he has forgotten to drop off one present, Santa Claus wearily makes his way in a variety of conveyances to the top of the Roly Poly Mountains to deliver it.
Photographs and simple text describe some of the fastest machines on Earth including Chuck Yeager's X-1 who broke the sound barrier in 1948 and the world's fastest boat.
Describes, in text and illustrations, the characteristics and functions of a variety of land and sea vehicles including barges, hydrofoils, trucks, automobiles, and high-speed trains.
Provides directions for making seventeen toy boats, cars, and planes, including such special vehicles as a milk-carton ferryboat and a toothpaste-box airplane.
