Text and experiments introduce the scientific properties of heat and cold, examining such topics as temperature, thermometers, freezing, and melting.

Mortimer the bear uses his toys and other favorite things to help young readers become familiar with the letters of the alphabet.

Photographs of a teddy bear demonstrate the relationships shown by such prepositions as up and down, in and out, and through and between.

Explains the basic principles of forces and movement through direct observation and through looking at everyday experiences.

With paintbrushes, buttons, crayons, and cups, a teddy bear helps readers learn to sort objects into sets using different criteria, such as color, shape, and texture.

Suggests the right words for describing sizes and amounts, from "short" and "tall" to "deep" and "shallow.".

Briefly explains the scientific principles of animal movement.

Text and experiments introduce the scientific properties of magnets, examining such topics as their strength, magnetic poles, and the making of magnets.