A vertically-opening, one-idea book with sure child appeal: working from the ground up, each high-rise tenant imagines what could be making the racket immediately above (``It sounds like elephants on pogo sticks!'' ``It sound like a dinosaur dancing the fandango!''); both imagined and real activities (revealed with a page turn—in this case, kids bouncing on the bed) are depicted in lively cartoon style. It's all topped off when imagination meets reality in King Kong himself—who's tap-dancing on the roof in a spectacular foldout. ``Now that really [is] silly.'' (Picture book. 3-7)