Mrs. Mustard's Baby Faces

This small-sized assemblage of baby photographs folds out, accordion-style, showing happy, beaming faces and frowning, crying faces. Wattenberg has captured 14 ingratiating infants in a delightful ``gallery.'' The book's sturdy construction and the photos' multicolored, zany backgrounds add to the book's charm. This endearing collection will be a terrific treat for babies, while their proud parents will no doubt recognize many familiar expressions. Ages 4 months-4 years. (Oct.)