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.

This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

This science fair project examines how seeds hitchhike on animals and clothing.

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

Find out whether putting something on top of a plant will inhibit its growth.

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!

How do organic materials become soil? This science experiment measures what materials biodegrade.

In this investigation, three different juices are tested to determine which juice contains the greatest amount of vitamin C.

In this project, a magnet is used to collect iron from breakfast cereals.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

This science research project challenges students to think of more effective lobster farming methods.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

This science fair project idea creates cool new colorful fabric pattern designs and experiments with the mixing of colors.

Construct batteries that make electricity from fruits with this fun science fair project.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

This science fair project idea teaches to understand and explore the concepts of crystal formation and dissolving substances.

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

Learn whether writing things down really makes things easier to remember.

Invite your third grader to do taste test science to observe how a strawberry tastes when it is paired with various condiments. The results may be surprising!

What can you do with hair after its cut? This science project teaches you practical uses for human hair.