From the producer of five other concept books illustrated with photographs, notably Step by Step (1987), an attractive vehicle for discussion and language development that is more complex than it first appears. The first paired pictures seem almost too easy: of course it's the splashing child who's wet. But the clues grow subtler: the girl who holds the hose wears a clinging, dripping T-shirt, while the boy fending off water with an umbrella is still dry. Even in a bathtub, one may be dry; on the other hand, water may be concealed under bubbles. And why is the bathroom mirror sometimes wet? The full-color photos have an interesting range of settings; they should prompt plenty of good questions. A final page suggests the wealth of language related to the subject and credits the children who appear (three races, two sexes, several ages) by name.