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Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

In this experiment you will replicate the mummification process by making a hot dog mummy.

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

Find out which kind of bubble wrap fares best when put in impact.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

Protozoa and ciliate and amoeba, oh my! The objective of this science fair project is for students to use a microscope and identify microscopic life.

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

This project examines whether people's taste perception is influenced by what they see.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

Discover whether cold or hot water from the faucet will boil faster on the stove.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

In this fun activity, your child will create their very own solar oven to bake s'mores!

Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

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

Will the shape of an ice cube impact how fast the ice melts?

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.