Hear Your Heart

Night and day, whether you're asleep or awake, your heart is always beating. Read and find out how your heart works and how to keep it healthy.

Be a Friend to Trees

Why should you be a friend to trees?Trees are a valuable natural resource. People depend on trees for food, and animals depend on trees for food and shelter. But most important, we depend on trees because they add oxygen, a gas we all need, to the air. While trees give us many wonderful products, we must also protect them because we can't live without them.

Honey in a Hive

In spring and summer, honeybees gather nectar to make into honey. These fascinating insects live and work together in complicated societies, complete with queen bees and workers. Read and find out about honeybees and their creation -- honey!

Dolphin Talk: Whistles, Clicks, and Clapping Jaws 

Dolphins are smart. They are so smart that they can talk to each other. Dolphins communicate underwater for the same reason people talk on land: to let others know who they are, where they are, and maybe even how to feel. Also included are activities that explore how dolphins talk to each other.

The Planets in Our Solar System

Where is it partly cloudy and 860°F?Venus. Read about the eight planets in our solar system and Earth's special place in it. This book also includes instructions for making your own solar system mobile, and on the new "Find Out More" page learn how to track the moon and visit the best plant web sites.

What Is the World Made of

Did you ever walk through a wall? Drink a glass of blocks? Have you ever played with a lemonade doll, or put on milk for socks? This latest addition to the Let's-Read-and-Find-Out Science series introduces the youngest readers to an important science concept: the differences between solids, liquids, and gases. Any child who wants to know why he can't walk through a wall will enjoy Kathleen Zoehfeld's simple text and Paul Meisel's playful illustrations.