While working on a time machine for the Spring Science Fair, Ordinary Boy discovers the true identity of long-lost Superopolis hero Meteor Boy.

While trying to decide on a science fair project, third-grader Wilson struggles with fractions and, much to his embarrassment, his parents sign him up to work with a math tutor.

A boy sends off for "Professor Swami's Super Slime" to use as his science fair project and then has to cope with the funny disaster that follows.

Fourth-grader Katie is concerned when an older girl uses live mice in a science fair project, but when Katie turns into the sixth-grader and has to run the experiment herself, she has a different opinion of the student.

Third-grader Zeke Meeks needs to win the prize in the science project contest because the class bully is threatening him, but so far all his ideas are ending in messy disasters; can his friend Hector save the day?

When the doorbell keeps ringing but nobody is there, Katharine is convinced that her schoolmate Vanessa is playing tricks on her--until a school science project provides a different solution.

For the first time in years Eerie Elementary is planning a science fair, which may not be a good idea in a school which is alive and out to get the students--but when Sam and his friends find a book of experiments that contains all of Orson Eerie's notes, it may turn out to be the key they need to finally understand the mad scientist.