When a warm March day beckons Aldo and his best friend, Jack, outdoors to their fort under the giant pine tree, stick-in-the-mud Aldo gets, well, stuck in the mud. As they dig Aldo's sneakers out from the embankment, they unearth a humungous bone, which rock-hound Jack believes to be a dinosaur fossil from the Jurassic period. Their hilarious quest to figure out the bone's origin and value takes them to...