Can an African pygmy hedgehog power a lightbulb by running on an exercise wheel? Seventh-grader Annie Cooper's experiment found out the answer: Only when it wants to!

Sixth grade ballerina Hannah Kline speaks with judges John McGoldrick and Bridget Elliot about her project, "The Effect of Various Music Styles on Balletic Balance."

Ninth-graders Vishwa Rasania (left) and Janet Sorrells demonstrate how their solar-powered vehicle works.

Judge George Symula talks with 12th-graders Emily Metzger (center) and Andrea D'Eramo about their project, "Diatoms: a Study of Water Health."

From left: 12th-graders Zac Clements, Mike Chadwick, and Mike Child demonstrate the behavior of their non-Newton fluids.

Sixth-grader Michael Jacoby shows off the effects of household cleaners on the growth of pea plants. Mr. Clean and Windex were hands-down losers to a “green” cleaner, Shaklee’s Basic H2, and water.

Dapper 12th-grader Clark Jacobson tells judges Doug Rothkopf, Holly Rothkopf, and Stephen Friedrich about his experiment, The Effect of Beauty on Job Applications.

Sixth-graders Ryan Byrne (left) and Thos Brown display the sheet they used in their experiment on age and perception in which participants of various ages identified a unique item in a group.

Eighth-graders Nikki Margaretos (right) and Katya Schwiegershausen investigate aspects of wind turbines and their generators.

11th-grader Josh Zimmer listens to a judge's questions about his project on PEM fuel cells.