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.

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

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.

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!

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

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

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 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.

With some cookie dough and ordinary household objects, let your kindergartener explore how fossil imprints are made.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

Lead your first grader on a nature walk ... with a scavenger hunt-style twist! They'll try to capture photos that correspond to paint chip colors.

Reinforce your child’s understanding of the alphabet by helping them construct all of the letters using pipe cleaners.

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

Will increasing the amount of salt in water effect how slow or fast the water freezes?

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

This simple project makes young children aware of their sense of smell and its capacity for providing them with information about their world.

This science fair project idea examines whether boys and girls differ in reflexes.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Believe it or not, images that are cast upon your eye's light-sensitive screen (called the retina) are upside down. Here's a fun, fast experiment to prove it!

Learn to solve a crime scene investigation using an important forensics tool: oblique lighting.

This kindergarten science activity will help her explore the changing states of matter which transform an egg from raw to soft to hard-boiled.

Help your kindergarten scientist predict and observe as she explores the science of smell...and have a great time doing it, too.

Instead of the traditional egg hunt, try this creative variation that will result in a beautiful Easter garden.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.