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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How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.
Applied Mathematics
Fifth Grade
This science fair project idea is develops new or improved paper making techniques and encourages recycling.
Consumer Science
Elementary School
In this project students learn about the golden ratio and investigate if it can be used to predict people's assessment of beauty in others.
Applied Mathematics
Middle School
How do search engines work? What makes various search engines different? This project delves into the world of web crawlers, caching, indexing and algorithms.
Applied Mathematics
Seventh Grade
In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.
Applied Mathematics
Ninth Grade
The objective of this experiment is to evaluate whether funny advertisements are more or less effective than serious advertisements.
Consumer Science
Tenth 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.
Applied Mathematics
Eighth Grade
Figure out which fruit has the most vitamin C (ascorbic acid) in this fun science project!
Applied Mathematics
Sixth Grade
Research is dependent upon the idea that sample sizes are generally representative of a population...but is this true? Test the assumption with M&Ms!
Applied Mathematics
Middle School

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