When a goo monster crashes the science fair, the Princess in Black is on the job, and with the help of the Princess in Blankets, sets out to save the science fair.

When Heidi is paired with Stanley, her worst enemy's best friend, for the Brewster Science Fair and she suddenly starts getting notes from a secret admirer, she tries to use magic to discover the note-writer's identity.

"Seventh grader Wendy Toledo knows that black holes and immigration police have one thing in common: they can both make things disappear without a trace. When her family moves to a new all-American neighborhood, Wendy knows the plan: keep her head down, build a telescope that will win the science fair, and stay on her family's safe orbit. But that's easier said than done when there's a woman hiding out from ICE agents in the church across the alley--and...

"Wanting to create a science fair project that makes an actual difference, Jessie decides to test a local creek for pollutants before her experiments are sabotaged by suspicious accidents"--

Presents eight of Rapunzel's adventures in which she tries to find out why her hair is long again, enters the royal invention convention, faces problems in her friendships, and journeys back to the tower she grew up in.

When all the second grade students must enter the science fair, which has global warming as its theme, best friends Ivy and Bean team up to create an unusual project.

The students of Mouseford Academy are participating in an enormouse science fair! Mice from schools around the world are all hoping to take the top prize. The Thea Sisters would love to win, but so would Ruby Flashyfur and she's willing to do whatever it takes! Can these mice play nice, or will the science fair be a total flop?

Ella Mentary School is having a science fair! Guest scientist Dr. Snow has arrived to help A.J. and his friends conduct their own cool experiments. But what is "the snowman" really planning? And what does STEM even stand for anyway? When Ella Mentry School holds a science fair, Dr. Snow arrives to help A.J. and his friends conduct their experiments.

The Code Busters are competing in their school's science fair, but when a mysterious drone ruins their project, it is up to sixth grader Cody and her friends to figure out who is responsible. Back matter includes keys to the codes and solutions to the coded messages that appear throughout the text.