This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

This science fair project idea examines liquids of different densities.

The project determines which laundry detergent is best for cleaning clothes.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

This science fair project idea provides evidence that air is everywhere and takes up space.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

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

Teach your kids about entropy with this fun, easy exercise, and teach your money to dance while you're at it!

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

In this project, different brands of microwave popcorn are tested and compared.

This science fair project idea produces sounds by creating vibrations using different objects.

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

This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.

This project investigates the affect of storage temperature on microwave popcorn.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Invite your third grader to do taste test science to observe how a strawberry tastes when it is paired with various condiments. The results may be surprising!

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

Your second grader will love this simple soda bottle race car activity. Make a ramp and customize your car for an entertaining way to learn scientific concepts.

Try this chemistry experiment with your curious kid and get some "shocking" results!

Help your child create a working lung model that fills with air just like the lungs inside of his own chest when he breathes.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

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!

Your third grader will be amazed at the explosive combination of vinegar and baking soda in these chocolate volcano cupcakes with white chocolate "lava."

Beetles come in many shapes and colors. Here's how your second grade child can create his own beetles to paint and play with!

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!