Mrs. Green has organized a class election and instructed everyone to run for something, but Hubey finds himself running for president against Doris, who has bought out the entire class with ice cream.
The students must deal with a scary bus driver named Mr. Fenderbender, mosquitoes as large as Dracula, and their mean teacher, Mrs. Green, on their class trip to the Black Lagoon.
Hubie struggles to decide on a project for the science fair, weighing the pros and cons of cloning himself or creating a laugh machine. Contains science-related jokes and puns throughout the story.
