This book is divided into six units - Animals, Rocks, Day and Night, Fire and Temperature, Machines, Rockets. Each unit is divided into sections, which are followed by "Find Out" - one or more experiments, by "Looking Back" - a review of material just studied, and by "Questions To Think About" - a challenge to investigate more than is presented within the section. At the end of each unit a section called "Remember" summarizes the important learnings of the unit. Then comes "Thinking Ahead in Science", a group of questions for which answers may be found in encyclopedias or in other source books. Finally, "Things To Do" at the close of each unit suggest interesting research and activities to be done after the basic work of the unit is completed. Grade 2-3.