Fernando Krahn's story in pictures of two boys who put on their fellow citizens with a home-made monster has more narrative interest and incidental wit than most wordless picture books. From the boys' secret construction of a dragon-like head on a long green neck, which then surfaces in several sly but conspicuous appearances around town, to their triumphant autocade return after the creature has rescued them from being lost in the woods -- kids won't take their eyes off that silly inert beast except to check the reactions of the spectators and the ingenuity of the two young perpetrators.