This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

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.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

This science fair project idea investigates the difference in reaction times between boys and girls.

This basketball project explores the best way to make the perfect shot every time.

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

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

Science fair project which examines the relationship between frequency of spider web vibration and spider's response 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.

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

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

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!

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.

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.

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

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

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

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

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

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

Examine the effect of pressure on carbonation in soda.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

This science fair project idea explores whether mint, known for its âcooling sensationâ really does lower temperatures.

Discover whether a metal will expand under hot water.

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

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Start your toy engines -- this is going to be a fast and friction-filled race!

This project examines what types of objects burn and which burn faster and cleaner.