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Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

Wondering how we know that air is there? Here's a quick and easy experiment that proves that air may be thin, but it's not too wimpy to block your shot!

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

Your child will learn science and make a fun new malleable toy with this balloon sandbag science experiment.

Glass is see-through, but usually you can still see that it is there. In this experiment, we use baby oil to make glass go completely invisible.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Determine whether a hot liquid cools off faster when liquid is added before or after a two minute wait.

Make your own greenhouse - out of a balloon! Your child will learn how greenhouses work as they plant radish seeds and watch them grow.

Looking for a fun project on energy? Check out this fun elementary school science fair project idea that demonstrates chemical energy in a bottle.

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

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

Dinosaurs were huge creatures that left behind huge footprints that lasted for millions of years. In this science fair project, kids learn how dinosaur tracks were left behind!

Check out this fun science fair project idea to determine if the size of a particle affect the rate or speed of a chemical reaction.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

In this cool catalase and hydrogen peroxide experiment, kids put a potato in a jar of hydrogen peroxide to see how catalase acts as an enzyme.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

Conduct a simple science experiment to see if flowers from your garden pass the acid-base indicator test with this exciting chemistry activity.

Before digital cameras, before Polaroids, there was the original pinhole camera. Build a pinhole camera and see what true vintage photography looks like!

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

What is condensation? Little mad scientists will learn about condensation, states of matter, and air pressure by conducting this cool science experiment.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.