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.

Sort by:
Showing 1 to 15 of 48
Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!
Third Grade
Science fair project that helps visualize how the human brain functions by constructing a model of a brain.
Middle School
Check out this fun high school science fair project idea to identify features of a mushroom and learn how do humans use fungi to their benefit?
Ninth Grade
Research optical illusions and human auras. Understand why the probable cause of perception is mach bands.
Middle School
High School
Determine the growth rates of different types of human hair. Ask volunteers to not cut their hair until the end of experiment. Measure hair length.
Middle School
High School
Study structure of the lens found in the human eye and determine whether it is concave or convex. Prepare a ray diagram, formulate hypothesis.
Seventh Grade
Eighth Grade
In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.
Second Grade
This science fair project idea explores the different parts of the human ear and  models how the human ear reacts to sound waves.
Elementary School
Fourth Grade
This science fair project idea tests whether it is true that humans are in the morning than later during the day/night.
Middle School
High School
This science fair project idea explores how far the average human can see.
Middle School
High School

Share these projects with friends

clear all

Filter by

Recommended Learning Products
Trust to find smart things kids love
Unlimited Workbooks and Worksheets
90% of Students Understand Concepts Better Since Using PLUS
Reading and Math Program for Kids 3-7
300+ games and activities. Try it for free!
Unlimited Library of Children's Books
Over 750 stories at your fingertips