Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

Construct and experiment with a periscope using reflected light rays to gather an image.

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

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.

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

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

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

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

This project explores ways to prevent static electrical shocks.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Chlorine and chloramine are added to our tap water to kill harmful microorganisms. What is the best way to filter these disinfectants in your drinking water?

Plants and light seem to be good buddies, but how far does the friendship really go?

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Bring a little science to your third grader's Christmas as you test out his sense of smell by exposing him to common Christmas scents found in your kitchen.

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

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

Let your second grader pay homage to an ancient Olympic tradition with this modern day Olympic wreath!

This science fair project idea demonstrates that plants give off water.

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

Check out this fun and easy science fair project idea on germination of a seed and learn to identify exterior and interior parts of a bean seed.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.