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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This science fair project idea discovers the effect of (high) heat on animal cells.
Middle School
Determine whether magic salt is more effective at melting snow than regular salt. Pour one ounce of salt over the ice cubes, compare the melt downs.
High School
Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.
Fifth Grade
Sixth Grade
Science fair project which determines whether the depth of a boat in the water changes how fast it moves and how straight it sails.
Fifth Grade
Sixth Grade
Science fair project that examines the relationship between the size of a bubble and how quickly it falls. What is the correlation?
Seventh Grade
Eighth Grade
Determine how proficient you are at making estimations and learn how to make more reasonable estimates.
Middle School
Physical Science
Be like Ben (Franklin, that is) and discover electricity in your own backyard. Or kitchen, or bedroom, or school science lab...
Fifth Grade
Science Fair Project Ideas
This science fair project idea focuses on two classes of sugars monosaccharides (fructose) and disaccharides (sucrose or table sugar).
Middle School
Physical Science
The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.
Elementary School
Third Grade

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