Science Fair Project Ideas 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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The goal of this science fair project is to demonstrate magnetic forces of attraction and repulsion using a magnet and everyday objects.
Middle School
Learn how healthy potted tomato plants can mature and bear fruit in a hydroponic environment! Use for free science fair project ideas.
Middle School
High School
Learn how to test for the production of carbon dioxide by respiration in plants with this science fair project.
Middle School
High School
Learn about plant growth with this science fair project using a pinto bean plant! Use for science fair project ideas.
Middle School
High School

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