Millicent E. (Millicent Ellis) Selsam

Greg gets a microscope and has a fascinating time looking at sugar and salt crystals, flower, hair, and much else.

A little boy experiments to see what things grow when planted, and then collects all kinds of seeds to plant everywhere he goes.

Keeping a sharp eye out for clues like animal tracks and odors can help people identify the animals that have passed through an area.

A photographic essay describing four kittens' first eight weeks of life.

Text and drawings explore the characteristics of various leaves.

Explains how some insects fly south for the winter and others spend the cold months under ground, under water, in unused buildings, or as eggs or pupae.

An introduction to the many places birds make their nests, such as chimneys, cliffs, bushes, traffic lights, and window ledges, and the unusual things that might be built into the nests.

Examines the differences and similarities of ducks, geese, and swans.

Traces briefly the history of man's use of plants as medicine, describes the discovery of several plants which made medical history, tells of the plant medicines which are still in use today and of new uses of old plants, and discusses poisonous plants.

Discusses the history, structure, and types of mushrooms and describes how one variety is grown.