 When Beaver buys a wrecked  coaster car  from Eddie Haskell, Wally pitches in to help his little brother fix it up and school chum Penny Woods promises him the wheels from her old doll buggy. But Beaver forgets his tools when he goes to Penny s house to remove the wheels and panics when he runs into his best friends, Gilbert and Richard, while trying to sneak the buggy home.