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.

Does your middle school teenager have good reflexes? Gauge his reaction time in this science and math activity that requires only a yardstick and a friend.

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

An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

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!

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

Every time a sound is produced it emits a sound wave. This experiment demonstrates how sound travels, using nothing more than a spoon and a string!

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!

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.

In this activity, your child will make her own "quicksand" to better understand how a substance can be both fluid and solid at the same time.

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

With a clear bottle and a few plastic straws, you can easily make a hummingbird feeder and demonstrate the effects of atmospheric pressure at the same time!

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.

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

The next time you and your fifth grader go on a hike, take along this key to figure out which common North American animal left a track along the river bank.

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

Many ancient cultures used the rising or setting sun to create calendars. Observe the setting sun once a week to come up with your own solar calendar!

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!