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?

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

The objective of this science project is to determine the length of time for different seeds to germinate.

This science fair project idea explores whether factors such as temperature and concentration affect the pH of a solution.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

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

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.

This science fair project idea produces varying pitches of sound.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

In this science fair project, students use the streak test to tell minerals apart from each other.

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

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

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

Take a dive into the candy jar with this yummy science experiment.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

This simple project makes young children aware of their sense of smell and its capacity for providing them with information about their world.

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.