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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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Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?
Weather and Climate
Second Grade
Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?
Weather and Climate
Second Grade
Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.
Weather and Climate
Fourth Grade
Looking for a way to keep your kid busy during the long, hot days of summer? These science projects will spark your young learner's curiosity going into the new school year. What's more, conducting an experiment or two is a great way to take your mind off the sweltering temperatures!
Weather and Climate
Elementary School
Bake some cookies with an oven that collects sunlight and traps the shorter wavelengths (heat!).
Weather and Climate
Middle School
Looking for a way to liven up a hot summer day? A little hands-on science is the perfect way to keep your kid occupied. So why not recruit your budding scientist and conduct an experiment or two?
Weather and Climate
Elementary School
Check out this free high school science fair project to explore the physics of the Coriolis effect with a homemade Foucault Pendulum.
Weather and Climate
Ninth Grade
In this science fair project, students use hot and cold water to simulate what happens when a warm front meets a cold one.
Weather and Climate
Middle School
Science fair project that guides you through how to test the humidity in the environment using a homemade psychrometer.
Weather and Climate
Sixth Grade
In this science fair project, you'll make a 'ghost' appear in a test tube, and learn about what happens when hot water and cold water interact.
Weather and Climate
Elementary School
Science fair project that examines condensation and the conditions needed in order for dew to form.
Weather and Climate
Second Grade
How fast is the wind blowing? This science experiment provides step-by-step instructions to help you answer this question.
Electricity and Magnetism
Weather and Climate
.Have you ever had problems with your wifi signal strength? In this experiment you will learn about how wireless signals pass through the air and solid objects.
Electricity and Magnetism
Sixth Grade
Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.
Weather and Climate
Third Grade
Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.
Weather and Climate
Second Grade

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