Gives instructions for constructing simple weather instruments and how to use them to predict and record the weather.

Discusses how common household items can become useful inventions, how many inventions were discovered accidentally, and how new products can be patented.

Presents activities using a magnifying glass and, for the most part, objects that are found around the house.

Defines what an allergy is and how it can affect skin, respiratory tract, gastrointestinal tract, ears, eyes, and mouth. Discusses different types of allergies, causes of allergic reactions, and treatments.

Surveys the different holidays celebrated throughout the year by the early settlers in America and describes some of the various activities, sports, and toys with which they amused themselves.

Discusses how such principles of physics as force, gravity, and momentum apply to a variety of athletic actions, with experiments for the reader to try.

Discusses the processes by which scientists determine the age of their specimens, such as counting the number of tree rings, reading the strata, and using chemical analyses and the carbon-14 test. Also looks at recent findings that may tell us how old the universe is.

Discusses the planets, with particular emphasis on comparing them to each other and especially to Earth.

Explores some of the world's most unusual ecosystems found in caves, the deep sea, hydrothermal vents on the ocean floor, underground aquifers, and rock deep below earth's surface.