Grades 3-5. This volume from the Be Healthy! Get Fit! series, part of the Science Readers: A Closer Look collection, presents a broad—sometimes overly so—look at staying robust and active. Without a strong thesis statement, the chapters feel rather random, taking on brain signals, junk food, calories, heart rate, water consumption, and so on without much linkage between them. As a compendium of starting points, though, it’s pretty solid, giving the health-curious grade-schooler plenty to chew on (or stop chewing on, as the case may be). Greathouse’s tone is extremely conversational (“Well, the first step is to shut off the TV and turn off the computer”), and she litters her chapters with pronunciations of more challenging words (“dahy-uh-BEE-teez”). The layout is varied and friendly, with stock shots of demographically diverse kids hopping about and looking plenty happy. “Throw a Fitness Party”—an activity that comes off as more fun than you’d suspect—concludes this unfocused but potentially helpful title.