Judy is excited about becoming a doctor, especially when Class 3T starts a new unit on the human body, but she learns more about being a patient when she catches tonsillitis from her little brother, Stink.

Surprises are in store as Stink excavates his backyard in search of a relic from an extinct beast -- and Judy lends him a little sleight of hand. Mega-chomp! Stink wants to make the find of the century. He's on a dig, dig, digging quest in his backyard to find a tooth from a saber-toothed cat, otherwise known as a Smilodon. Why not? Two kids in Michigan found a mastodon bone in a backyard stream, and a girl in Great Britain found a pterosaur bone....