This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

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

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

The weather is a key kindergarten science concept. With this activity your child will learn about wind direction and create a self portrait, too!

Recycling may be a confusing concept for your little one, so take the time to teach them the magic of compost - right in your own backyard!

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

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

Do this activity to help your kids see how seeds contain "baby" versions of big plant stems, roots, and leaves.

Satisfy your kindergartener's fascination of different sounds with this easy science project, where they'll use their ears instead of their eyes to identify sounds!

Children are imaginative story-builders. Create a shoebox habitat with your child to put those budding creative instincts to good use.

Make a bear cave for your child to play and explore, learning about bears and winter hibernation.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

What happens when eyes see something that the brain knows cannot be true? In this science activity, the brain has to "fudge" it when interpreting what you see.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

In this hands-on activity, kids learn what it takes to foster seedlings into full-grown plants, all in a regular old soda bottle!

Are you looking for an out-of-this world activity that's both fun and educational? This solar system garland is a great way to introduce your child to astronomy.

Give your budding young observers a chance to discover simple machines at use in their own home.

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

Recreate the fantastic phenomena of solar eclipses with your child using just a flashlight, a quarter, and her very own face!

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Teach your creative second grader about proportions, animals, and proper cutting methods with cucumber carving.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

Help your child experiment with the combination of acid and baking soda by making these homemade bath bombs!

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.

Every time a sound is produced it emits a sound wave. This experiment demonstrates how sound travels, using nothing more than a spoon and a string!

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

Here's a household scavenger hunt that shows kids the natural sources behind everyday objects...and builds reading skills, too!