Mean Mrs. Green says that everyone has to invent something for the school science fair. But everyone would rather invent a way to get out of it! Hubie can't decide on what he's going to do. He thinks all the good inventions have been done already. And all of his friends have figured out what they are going to do. He tries to decide between cloning himself or building a laugh machine. After a bad dream about cloning, he decides to build a laugh machine....

When his teacher requires that everyone in class take part in the talent show, a boy asks his mother for suggestions and she insists he start taking piano lessons.

"Dr. Victor has a secret. Has he created a monster? The Bailey School kids are going to find out!"--Cover.

Every class has to come up with an idea for a booth at the school carnival. Too bad your class has chosen your idea: a dunking booth and they want you to be the one who gets dunked!

While worrying about the class gift exchange, Hubie discovers the true meaning of Christmas.

Principal Krupp once again turns into the superhero Captain Underpants in order to save the world, and Jerome Horwitz Elementary School, from the evil talking toilets and the Turbo Toilet 2000.

After getting so bundled up that he can hardly move, Hubie tries to enjoy his snow day off from school.

Enjoying a special luau at Camp Lone Wolf, the kids are convinced that one of the hula dancers is the legendary wolfman! Harry Groto has yellow eyes, long fingernails, and a scary growl--he even gets hungry when the Moon is full.

Eddie and his friends are having a blast at the spring carnival. But a tiny woman who sells t-shirts is scaring some of them away--she's got bright red hair, pointy ears, a squeaky voice, and yells at the kids--just like a mean troll.