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

In this science fair project, young children discover what happens when two fluids that have different densities get together.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

How do we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

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

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

This science fair project examines how seeds hitchhike on animals and clothing.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

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.

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

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?

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.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Help kids tap into their inner inventor by teaching them how to make peanut butter through trial, error, and lots of taste testing!

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

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

Learn how to grow an avocado plant indoors with your 1st grader in this hands-on gardening activity.

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

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.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

This classic children's game demonstrates how sound travels through air vs. through a solid.

In this science fair project, we'll explore how blocking the sun's light can stop those can stop photosensitive paper from changing color.

Are your taste buds up for the challenge? Put tongues to the test with this science fair project that examines who enjoys sour flavors more, adults or kids?

Dinosaurs were huge creatures that left behind huge footprints that lasted for millions of years. In this science fair project, kids learn how dinosaur tracks were left behind!

Check out this silly game that will put your kid's animal habitat knowledge (and acting skills) to the test.

April showers may bring May flowers, but your child can preserve the beauty of spring's bounty all year long with this simple craft project!

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

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!