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!

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

Demonstrate the principle of jet propulsion in this science fair project by building a rocket from household materials.

Thoroughly research image search engines. Consider possible improvements for visual search engines. Help design better image-matching engines.

Believe it or not, the common spud has enough electrochemical energy to power a small digital clock.

When critters protect themselves by taking on the patterns of nature, it's called "camouflage." Play this camouflage matching game with your child!

In this game, players will learn interesting facts about animal adaption and practice them using a fun matching card game!

Help your middle schooler improve his observation skills by playing this simple observation and spatial memorization game.

Discover whether people can distinguish what a person looks like just by listening to their voice.

Science fair project in which you will start a fire from scratch without using matches or a lighter.

Check out this mind-blowing experiment in which a hard-boiled egg will fit through an impossibly small opening with the help of only a few matches!

This fun science fair project idea explains what a circadian rhythm is and explores the types of biological activities that follow a 24 hour cycle in mammals.

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

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

In this "paper and pen" science fair experiment, students will research the difference between standard time and astronomical mean time.

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

Clouds are formed when warm and cold air meet. Here's a way for kids to see it all up close!

Research different measurement systems, design your own new or improved system that can measure something difficult to measure with traditional systems.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Free science fair project idea that examines cheating in school-age children. Project involves a task in which children are tested on various tasks.

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

All you need are pencils, paper and some scissors to get started on this easy and fun game to review astronomy information, or other types of study concepts.

The apparent movement of the sun has been used to keep time since the bronze age. In this science fair project, kids plot solar time against mean solar time.

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 fun experiment, we'll find out how color affects heat absorption!

Science fair project which identifies the most effective insulator that you could use to make a winter coat by comparing how well cloth and cotton trap heat.

In this science fair project, we'll explore how blocking the sun's light can stop those can stop photosensitive paper from changing color.

Satisfy your kindergartener's fascination of different sounds with this easy science project, where they'll use their ears instead of their eyes to identify sounds!

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.