The Shrinks family, and a few of the neighborhood kids, have assembled in George's backyard for Dad's annual Monster Movie Marathon. The kids add to the fun of watching hooky old monster movies by playing pranks on each other. When some unexplained pranks begin to happen to the kids, George, Becky and friends set a trap for the mystery prankster - who turns out to be a new kid who has moved in behind the Shrinks. Here they thought she was the "mean" new kid in town but turns out she's a very creative thinking new friend! She just wanted to be part of the fun.