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.