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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 science fair project, kids start a chemical reaction that will make a balloon inflate itself!
Elementary School
Fourth Grade
In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.
Kindergarten
Elementary School
This science fair project teaches students the differences between fruits and vegetables.
Elementary School
Second Grade
Check out this cool and free middle school science fair project idea on how to make a solar oven.
Seventh Grade
Easy
Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.
Fourth Grade
Zoology
Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.
Fourth Grade
Easy
Explore the wave-particle duality of light! Learn how light can behave as both a wave and a particle in this cool physics science fair project idea for kids.
Ninth Grade
Physics

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