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 investigates the difference in reaction times between boys and girls.

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

This project compares the strength of one, two, and three-ply toilet paper.

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

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.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

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!

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

Find out whether a longer airplane will fly farther or a wider paper airplane.

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.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

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 examines whether plants are still able to grow normally if they are turned upside-down.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

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

How powerful is the reaction between baking soda and vinegar? Find out here!

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

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

This science fair project idea examines which type of insulation holds in the most heat.

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

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

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!

This science fair project idea explores substances that cause a bubble to last longer.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.