Meet a variety of penguins and learn all about where they live, how they take care of their young, and what they do for fun! Overlay pages that can be turned to change the nature of the next double-page spread.

Introduces the behavior and life cycle of cats. Features acetate overlays to hide and then reveal information.

Offers information about various breeds of dogs, as well as basic physical characteristics, communication abilities, and the kinds of work dogs can perform. Overlay pages can be turned to change the nature of the next double-page spread.

Transparent overlays depict the plant and animal life found along a river and how rain and winter can change the river.

Provides information about the physical characteristics, habits, migration patterns, and markings of different species of birds. Includes transparent overlays.

Illustrations with transparent overlays and brief text describe the physical characteristics, life cycle, habits, and various species of frogs, as well as presenting several related amphibians.

Meet a variety of penguins and learn all about where they live, how they take care of their young, and what they do for fun! Overlay pages that can be turned to change the nature of the next double-page spread.

Follows a chestnut tree through the seasons as it sprouts from its seed, blossoms, grows, sheds leaves, and drops new chestnuts that will one day become trees too. Some of the illustrations are on clear overlay pages that can be turned to change the nature of the next double-page spread.

Laminated pages with transparent overlays introduce over fifty different plants from around the world and give details about their growth, life cycles, and value to animals and humans.

Explains various types of airplanes and other flying machines, including gliders, passenger jets, helicopters, and hot-air balloons. Features transparent acetate overlays.