Count 4 wooden men"" in varied styles or ""4 cats playing"" in an anonymous 19th-century watercolor; ""Count 14 train wheels/How many passengers?"" in a 1970 painting by Jack Savitsky, or ""20 eagles"" in an elaborate double-woven coverlet. The instructions are unimaginative, though the task varies somewhat with the material; what's of interest here is the quality and variety of the art, all from the Abby Aldrich Rockefeller Folk Art Center in Williamsburg, Virginia, and duly identified on the last page. An appealing, handsomely designed introduction to art forms from ornamental birth certificates to whirligigs, with subjects from the biblical (The Peaceable Kingdom) to the nearly contemporary (Eskimo Dogs, 1960).