machinery

During Christmas, Bob the builder encounters various adventures which challenge his problem-solving abilities.

Presents color-illustrated instructions for making six gadgets, including a flashing key chain, a doorbell, a bouncing animal, a secret code machine, a quiz game, and an alarm box.

Simple text and photographs describe the different uses of digging machines. Includes related activities.

Descriptive text, photos, and a story introduce terms and concepts related to machines, tools, and power.

Illustrations and simple text teach young readers about the different kinds of machines used to work on roads.

Describes simple machines and how they work, including the inclined plane, levers, wheels and axles, the wedge, screws, and pulleys.

Photographs and text provide information about farm machinery, looking at how farm work was done in the past, and explaining the purpose of tractors, and machines used for tilling, seeding, and harvesting.

Simple text and photographs introduce young readers to some of the most unusual and powerful machines.

Simple text and photographs introduce young readers to some of the dirtiest and most powerful machines.