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 31 to 45 of 186
The goal of this evaporation experiment is to learn about how different external conditions affect drying time.
Second Grade
Third Grade
Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.
Fourth Grade
This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.
Elementary School
Second Grade
This project investigates the affect of storage temperature on microwave popcorn.
Elementary School
Third Grade
In this science fair project, you will learn the differences between coarse-, medium-, and fine-textured soils.
Middle School
High School
Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.
Second Grade
Third Grade
In this science fair project, students make their own rain gauge to measure rainfall.
Fourth Grade
Weather and Climate

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