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Science Fair Project Ideas

Education.com has assembled a vast collection of science fair project ideas written by science teachers, professional scientists, and educational consultants on popular science fair topics ranging from physics and chemistry to biology and even sociology. We offer free science fair ideas suitable for every grade level, be it preschool, kindergarten, elementary school, middle school, or high school. Check the boxes in the sidebar to filter your results, or use the search bar to find that perfect science fair project or experiment your child will be sure to love.

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This play-activity causes young children to focus on and become more aware of their sense of hearing and the power of their ears.
Kindergarten
Life Science
This science fair project idea determines if family members can recognize one another using only the sense of smell.
Elementary School
Fifth Grade
Free science fair project idea that measures change in flexibility with age, using a variety of flexibility tests like Sit & Reach.
High School
Medium
Can you fool your eyes and your brain with an optical illusion?  The purpose of this science fair project is to demonstrate various kinds of optical illusions.
Kindergarten
Elementary School

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