Simon, Seymour

Examines the phenomenon of earthquakes, describing how and where they occur, how much damage they can inflict.

Describes the characteristics and habits of earthworms and includes directions for experiments to learn about their behavior.

Gives the formula for making bubbles explaining why some are big, some little, and why they stay in the air.

An explanation of Newton's three laws of motion with suggestions for simple experiments.

An introduction to caring for and observing goldfish. Also explains briefly their reproduction, senses, and how they can be taught tricks.

Describes the habits and habitats of frogs, their maturation process, and their anatomy. Includes instructions on starting and maintaining an aquarium.

A discussion of optical illusions, with explanations of why we see them and suggestions for creating illusions of our own.