Little Critter's class is going to the Critterville Museum of Natural History. They find out the dinosaur exhibit is closed because of a missing Triceratorops bone. Little Critter has an adventure solving the mystery of the lost dinosaur bone.
"Little Critter is searching for a missing sock all over the house, the yard, and the neighborhood. But even he is surprised by all the lost treasures he finds during his hunt!"--From publisher's web site.