The nature of science (NOS) is usually described as having six or more basic understandings or aspects. In this chapter eight aspects are listed, and the lesson provides a very simple example of how to voice your observations, make inferences and offer evidence, and model how understanding can change with new information. Chapters 1 and 2 are also included in this book selection. Chapter 1 focuses on science inquiry and the use of “The Early Years” column to support science and engineering learning. Chapter 2 focuses on assessment and the value of assessing children’s learning to understand how to make teaching more effective. It has an example of an assessment tool showing sequences of children’s science behavior in early childhood, with related scientific and engineering practices. A materials list, teacher background information, references, assessment, and outcomes are provided. Also included in the book selection are the Table of Contents, Acknowledgments, Introduction, A Word About Safety, and Index.