Underwater Zoos / by Millicent E. Selsam ; illustrated by Kathleen Elgin.

Comment les chiots grandissent / Millicent E. Selsam ; photographs by Neil Johnson.

When an animal grows / by Millicent E. Selsam ; pictures by John Kaufmann.

Plants that move / by Millicent E. Selsam ; illustrated by Fred F. Scherer.

Where do they go? : insects in winter / Millicent E. Selsam ; illustrated by Arabelle Wheatley.

Up, down, and around : the force of gravity / by Millicent Selsam ; illustrated by Kenneth Dewey.

A first look at dinosaurs / by Millicent E. Selsam and Joyce Hunt ; illustrated by Harriet Springer.

Big tracks, little tracks : following animal prints / by Millicent E. Selsam ; illustrated by Marlene Hill Donnelly.

A first look at animals without backbones / by Millicent E. Selsam and Joyce Hunt ; illustrated by Harriett Springer.

Biography of an atom, by J. Bronowski and Millicent E. Selsam. Illustrated with pictures by Weimer Pursell and with photos.