This science fair project idea produces varying pitches of sound.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

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

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

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

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

These flying potato poppers make a cool sound, create a celebratory mood, and they can teach your child about the power of air pressure.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

In this project students experiment with making music using only glasses of water.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

This science fair project idea explores whether talking to a plant will help it grow.

This science fair project idea investigates the difference in reaction times between boys and girls.

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

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

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

This science fair project idea determines what household items are good conductors of electricity.

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

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

Give your child an introduction to food preservation by making and canning your own yummy, homemade pasta sauce!

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.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.