This science fair project idea researches the definition of ‘biodegradable’ and explores this in a real-life setting.

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.

With this hands-on activity, you'll show how fall colors are hidden in the leaf all year long!

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

April showers may bring May flowers, but your child can preserve the beauty of spring's bounty all year long with this simple craft project!

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

Find out whether matte or shiny nail polish lasts longer.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

This science fair project idea explores substances that cause a bubble to last longer.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

Find out whether cast iron or regular teflon pans heat up faster and also retain their heat longer.

In this simple and social activity, children use size comparison skills to find objects in nature that are bigger, smaller, longer, and shorter.

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

Discover whether a metal will expand under hot water.

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!

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

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

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

Introduce your child to the amazing, almost magical phenomenon of static electricity!

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

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.

Here's a great early reading and science activity for curious children. Learn how to plant your child's name in seeds for a growing writing activity!

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.