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A simple introduction to the functions of the United States postal service, how the work is accomplished, and the impact that is has on the community.

Describes the characteristics of wallabies and how mother wallabies living in zoos are taught to care for their babies.

A simple introduction to the role of the police in a community, describing the work they do, what goes on at a police station, the equipment used, and various types of police officers.

An introduction to the physical characteristics, behavior and natural habitat of various species of whales.