This activity is for observing how gravity affects marbles as they roll. Cut pipe insulators in half lengthwise and use half of the pipe insulator to show children how to bend the tracks to create loops, ramps, and curves. Encourage children to place marbles on the tracks to discover how gravity affects the marbles as they roll. 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.