What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

In this project children discover, identify, and sort seeds from a variety of fruits and vegetables

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.

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

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

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

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

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.

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.

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.

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 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.

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

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

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!

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

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.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.