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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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Use applied math to model orbital eccentricity in this cool science fair project for 7th grade.
Astronomy
Eighth Grade
Kids will love making clouds and learning how to make a water cycle model in this fun science fair project idea that explores evaporation and precipitation.
Earth & Space Science
Weather and Climate
This science fair project idea researches the definition of ‘biodegradable’ and explores this in a real-life setting.
Ecology
Elementary School
It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.
Environmental Issues
Fourth Grade
Check out this cool science fair project on identifying rocks and minerals for kids.
Earth & Space Science
Geology
Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.
Weather and Climate
Aerodynamics
In this science experiment, test the pH of soil surrounding a gas station to determine if gas stations have a negative effect on the environment.
Ecology
Environmental Issues
4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.
Ecology
Fourth Grade
Little ones looking to get their hands dirty will love this series of fun plant experiments for kids that teach essential plant biology concepts such as photosynthesis, transpiration, capillary action, and tropisms in fun and hands-on ways. Little green thumbs get to do everything from literally cloning cabbage (which is actually quite easy to do, and very cool) to building their own working greenhouses. Check it out!
Environmental Issues
Ecology
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.
Ecology
Fourth Grade

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