Flip-Flap Theatre ($15.95; Nov. 1996; 1-55858-597-4): A wordless, low-tech theatrical experience: By flipping two sets of spiral- bound half-pages (which look like mirrored sets of Dutch doors), onlookers can set the stage for a host of odd beasts, people, and fabulous creatures. The story (or stories) is in the imagination of the beholder; Rubin's baroque illustrations can be manipulated by preschoolers and more sophisticated viewers with equal pleasure. (Picture book. 5-8)