Watch as a boy makes map of his room to show his friend the location of the supplies he'll need to care of the boy's hamster while the family goes on vacation. Simple text takes early readers step by step through the types of features a room map needs to have.

'What Is a Gas?' provides a simple explanation of matter, a description of gases, and gives examples of how gases can change into different shapes. The photographs and simple sentences help early readers grasp these concepts quickly.

This informative title uses accessible text and concrete examples to explain the different states of matter--a key science concept in grades K-2.

A rock sinks in the water. A hot air balloon floats in the air. Many objects float and sink. But what makes them move this way? And how do people use floating and sinking in their lives?