Does your child always demand to know why the sky is blue, how the sun moves across the sky, or where wind comes from?

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.

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

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?

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.

Learn about nature by making your own mini moss garden.

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.

This science fair project will help students learn about non-vascular plants, such as mosses.

Learn all about balance and motion as your child designs a corn maze!

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Make a wish upon a tree with this craft that also helps your child learn more about Chinese culture.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

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

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Inspire your child to learn about an amazing animal as she creates her very own polar bear habitat.

This will encourage your child to utilize their observation skills, develop aesthetic awareness, build artistic drawing abilities and learn about the seasons.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

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

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

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.

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.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

Before your treat your child (and yourself!) to a yummy snack, help her learn a little about Sir Isaac Newton's First Law of Motion!

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

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.