After being sent to jail for the rest of their lives, George and Harold are taken on a trip back in time by Tippy Tinkletrousers back to their Kindergarten days where they must deal with their bully without the help of Captain Underpants.

General Jackrabbit and his Robo-Rabbits from Jupiter attempt to take over the world on Ricky Ricotta's birthday.

By flipping the pages, the reader may view animated illustrations that follow a small mouse named Ricky Ricotta and his best friend, a giant flying robot, as they save the world from Victor Von Vulture and his vicious Voodoo Vultures from Venus. Includes easy art instructions for drawing characters from the book.

When Professor Pippy P. Poopypants comes to Jerome Horwitz Elementary School to teach science, and he goes off the deep end because students make fun of his name, only Captain Underpants can save the school from the professor's perilous plot.