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The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

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.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

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?

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

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.

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

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

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

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

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!

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

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.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

This science fair project idea examines the reason boats are shaped and engineered.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

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

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!