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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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Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.
Weather and Climate
Fourth Grade
Kids will learn about insulation, heat conduction, and the economic benefits of energy efficient windows in this cool science fair project.
Engineering
Fifth Grade
How does frost form?  How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.
Weather and Climate
Third 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.
Engineering
Sixth Grade
In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!
Engineering
Fifth Grade
What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!
Weather and Climate
Fourth Grade
Is the birthday paradox really a paradox, or just an intriguing problem that defies intuition? Find out with this birthday paradox science fair project.
Applied Science
High School
In this science fair project, students make their own rain gauge to measure rainfall.
Weather and Climate
Fourth Grade
Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.
Weather and Climate
Second Grade
In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.
Weather and Climate
Fifth Grade

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