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In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot move in a pattern related to the sound and rhythm of music.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

This science fair project idea investigates the difference in reaction times between boys and girls.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

This science fair project idea investigates the hardness property of minerals.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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?

This science fair project teaches students about wilting and browning of salad greens.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

This project compares the strength of one, two, and three-ply toilet paper.

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

How do organic materials become soil? This science experiment measures what materials biodegrade.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.