Briefly describes some unusual land vehicles, such as all-terrain vehicles, Indy cars, jet cars, dragsters, tanks, and solar cars.

Briefly describes some of the machines that fly in the air, including the Wright brothers' flying machine, helicopters, ultralights, dirigibles, hurricane hunting planes, supersonic airplanes, and others.

Describes special machines such as snowmobiles, snow plows, ice breakers, and tundra buggies which are used to remove or travel on ice and snow.

Photographs and text teach young readers about different types of screwdrivers and their uses.

Discusses different ways people have paid for things throughout history, including barter, cash, credit cards, and checks.

Examines the great movements of water called ocean currents, discussing how they are mapped, what keeps them moving, and how they can affect the weather.

Briefly describes the money used in some of the countries around the world and how money is exchanged between countries through trade and tourism.

Describes the formation and different parts of caves, including the entrance zone, twilight zone, and dark zone.

Describes how wrenches are used, what they are used for, and how they work.

Describes various machines that have been used in outer space, including the space shuttle, Skylab space station, satellites, and unmanned space probes.