An excellent easy science book clearly explains the three natural states of matter, and how water easily changes from one state to another, all in terms young children can easily understand. Zoehfeld's conversational style and frequent use of second person point of view will immediately engage the youngest readers. Her clear explanations use examples that are easily within the realm of early childhood, and she gives realistic suggestions of things children can do to see water in action: holding an ice cube in your hand, for example, or watching steam rise as water boils in a saucepan on the stove (with plenty of warnings about having an adult present). The book concludes with the step-by-step outlines for three easy science activities involving matter. (Ages 4-7)