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In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

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

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Camouflage is one of the most important animal adaptations in the African savanna biome. Kids create their own camouflage with this fun science fair project.

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

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

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!

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

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

Using a toy race car kids create a visual model of the Doppler Effect.

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?

In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

This classic children's game demonstrates how sound travels through air vs. through a solid.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

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

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

People have favorite flavors, but what about ants? Which ant food is the most popular?

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.