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Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

Water can go from solid to liquid to gas...but how does popcorn go from kernel to snack? Invite your first grade scientist to find out.

Build an electroscope, a simple device that measures static electricity, or the freely flowing electrical charges of the atmosphere!

Find out the differences (if any) in the frequencies of voices produced from a computer, from a phone, and directly coming out of the voice box of a human.

Find out whether matching resonant frequencies can cause objects to shatter.

How powerful is the reaction between baking soda and vinegar? Find out here!

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

Here's an interesting activity that will enable your child to make his own magnifier out of a drop of water

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

What happens when light hits a hard surface? Find out by conducting a simple light reflection experiment with your preschooler.

What's the difference between centripetal and centrifugal force? Students find out by seeing both in action as they conduct this experiment.

Check out this fun science fair project idea to learn about seismic waves and how fast they travel during an earthquake.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Why are some pennies shiny and others dark and dull? Find out with this cleaning copper coins experiment, which transforms dark pennies to bright ones.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

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!

Have you or your child ever heard that nursery rhyme and wondered just what curds and whey are anyway? Do this simple experiment together to find out!

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

Here's an investigative activity in which your child will discover real-world names and uses for sugar and find out how it is hidden in many different foods.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

In this fun science fair project idea learn about the multiple sources of radio waves and fin out how difficult it is to block them.

A homemade lava lamp gives any room a retro flair. Find out how to make a homemade lava lamp, and learn some science too, with this educational activity.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

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

Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

Learn how matter transmits sound with a simple, hands-on experiment using sand, water and air.

Here's a science experiment that gives your kids a chance to see how fire needs oxygen to burn, with a little math and writing practice thrown in.

Help your curious third grader construct a dazzling spinning wheel that will teach him about the science behind colors while providing some silly entertainment!

This fun, think-outside-the-box activity introduces kids to gravity and other basic scientific concepts as they construct an impressive marble run!

This surprisingly good glue recipe comes from common kitchen items.