This activity focuses on comparing objects using a balance. Introduce children to the balance by putting identical objects of equal weight on the two sides of the balance. Then give children time to explore by putting different objects on the balance. Encourage children to add or subtract weight from one side and to predict what will happen when they do. A materials list, internet resources, standards, and safety practices are provided. This book selection also includes the Table of Contents, Preface, About the Editors, Introduction, Simple Graphing for Young Children, Science Teaching Boards and Boxes, Basic Materials List, and Index.