Beginning readers will learn about the basic patterns of the Sun and Earth and what causes day and night.

Earth is made of different things-gases, rocks, soil, and water. A gas is something that can change shape and size. Gases helps beginning readers understand this basic element by looking at examples such as air and steam; the book also discusses how gases help protect the Earth.

A basic introduction to what you see on a rainy day.

A basic intrduction to what you see on a sunny day.

Beginning readers will learn about the basic patterns of the Sun and Earth and what causes day and night.

Winter, spring, summer, and fall, the seasons are one of nature's most familiar cycles. But why does the weather change? Learn why weather patterns change over the seasons.

Hibernation is a cycle that some animals go through every year. Most people know that bears hibernate. But why do they hibernate? And what other animals hibernate?

This book is a very basic introduction to maps and their uses.

Invierno, primavera, verano y otoño—las estaciones son uno de los ciclos más familiares de la naturaleza. Pero, ¿por qué cambia el clima? Aprenda por qué los patrones climáticos cambian a lo largo de las estaciones. Winter, spring, summer, and fall—the seasons are one of nature's most familiar cycles. But why does the weather change? Learn why weather patterns change over the seasons.

How do you organize a big project? See how these kids plan to clean up a park.