Pecorino Sasquatch proves that he is still the silliest boy in the world when his first day of Little League arrives and he realizes he has never hit or caught a baseball before--nor even chewed bubblegum.
When Ivy and Ray's parents are sent to jail, and left in the custody of their parent's accusers, they decide to look for evidence that will "spring" their parents.
Fearing that he may be failing fourth grade, Hank enlists the help of his friends, and even his annoying younger sister, in an effort to prevent his parents from attending a parent-teacher conference.
The pressure is on when Hank Zipzer is chosen as pitcher for the softball team at Public School 87's annual Olympiad, the most anticipated day of the school year.
As Mr. Gaskitt takes a series of jobs and Mrs. Gaskitt keeps winning prizes, their nine-year-old twins, Gus and Gloria, follow a substitute teacher who seems too good to be true.
A talking dog, the Mack children and the small elf-like Gigglers themselves must try to stop the prank that the Gigglers have mistakenly set in motion to punish Mr. Mack for being mean to his children.