Discusses the principles of sound, how animals and human hear, the speed of sound, noise pollution, and the use of sound waves in medicine. Includes related activities.

Explores the history of planet Earth, from its fiery beginnings to the present.

Explains how everything on Earth can be grouped into four states of matter and how matter can change from one state to another by applying heat or pressure. Includes related activities.

Goldie, Diane, and Cheryl find themselves jetsetting to sunny Los Angeles. Goldie befriends a silent film star and takes on a case of stolen film memorabilia.

Presents information and instructions for activities relating to principles of heat in everyday life.