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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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Showing 1 to 15 of 125
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.
Engineering
Sixth Grade
In this CD hovercraft science project, students will construct their own DIY hovercraft.
Engineering
Fourth 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
Analytical chemists perform chromatography to separate colors into pigments. Test the food coloring used in M&M's and Skittles candy in this fun project!
Forensic Science
Sixth Grade
Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.
Engineering
Second Grade
In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.
Engineering
Fifth Grade
This science fair project idea determines if family members can recognize one another using only the sense of smell.
Forensic Science
Elementary School
Kids will learn about insulation, heat conduction, and the economic benefits of energy efficient windows in this cool science fair project.
Engineering
Fifth Grade
Kids use applied math to build and test a parabolic mirror solar hot dog cooker in this cool engineering science fair project idea for middle school.
Engineering
Eighth Grade
This science fair project idea  develops an understanding through experimentation of which shapes are the most structurally strong.
Engineering
Elementary School

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