Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

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

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

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

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

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!

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

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 idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

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.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.