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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In this free science fair project idea, we model what a comet looks like.
Elementary School
What is a solid?  What is a liquid?  What is a non-Newtonian liquid?  Explore all these questions in this free science fair project idea.
Middle School
In this science fair project idea learn to model how an artificial satellite is launched into orbit.
Middle School
High School
Checkout this fun science fair project ideas to explore what animals in hot deserts do to cope up with the scarcity of water and scorching heat.
Elementary School
High school students recreate Michael Faraday's experiment in this cool science fair project that induces current in a coil of wire.
Ninth Grade
This science fair project idea examines how well individuals can remember a story they were told and how accurately they pass that story along.
Elementary School
Fifth Grade
This science fair project idea explores the relationship between oil and water in terms of density as well as hydrophilic/hydrophobic compounds.
Elementary School
Fourth Grade
This science fair project idea examines eye color genetics and the role it plays in eye color inheritance.
Tenth Grade
This science fair project idea explores what it takes to create a biosphere, or a self-sustaining ecosystem.
Sixth Grade

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