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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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In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.
Chemistry
Fourth Grade
Check out this cool and free middle school science fair project idea on how to make a solar oven.
Physics
Seventh Grade
Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.
Physical Science
Third Grade
This science fair project idea explores the fastest average speed a human can talk.
Physical Science
Middle School
High school students learn about resistance, resistivity, and if copper is the best metal conductor in this great physics science fair project idea.
Electricity and Magnetism
Tenth Grade
Check out 10 of our favorite chemistry experiments for kids. Little mad scientists can learn about endothermic and exothermic reactions, electrolysis, oxidation, and combustion with easy experimental procedures that enlighten young minds while minimizing the need for specialized equipment.
Chemistry
Science Fair Project Ideas
The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.
Physics
Sixth Grade
Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.
Physics
Sixth Grade
Build a magnetic linear accelerator using a ruler, neodymium magnets, and small metal balls in this fun science fair project exploring magnetic propulsion.
Physics
Electricity and Magnetism

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