A series of color photographs of a baby aged four to fourteen months details the activities that lead to learning to walk. Captioned ""sleeping,"" ""kicking,"" ""roiling over,"" ""kneeling and holding on,"" ""tossing,"" ""walking,"" ""running,"" etc., 22 portraits show a thriving child as he develops. The diversity and freedom that foster learning are suggested by including wading in a gentle surf and climbing up and down a rough boulder; curiosity satisfied is represented by looking in, which necessitates standing on tiptoe; the joy of standing alone is expressed by clapping. Clear, well-composed and well-chosen photographs make this a highly satisfactory concept book for the very young.