In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

This project compares the strength of one, two, and three-ply toilet paper.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

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

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

You don't need to wait for rain to see a rainbow. Make one yourself, and teach your child about light and weather in the process.

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!

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

Unlike other seed sprouting projects, this one allows kids to compare five different sprouts (either 5 herbs or 5 flowers) by watching them grow in a glove.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Celebrate autumn with a seasonal bash. Welcome the fall with a festive party for your little one and her friends, full of crafts, snacks and fun games.

Looking for an enjoyable evening activity you can do with your kids? Study the stars: help them learn about constellations by making one of their own.

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

Let your fabulous crafter use their favorite flowers, fruits and herbs to whip up a delicious perfume that they can proudly present to a friend or a loved one.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

This project examines whether people's taste perception is influenced by what they see.

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.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

It's easier than you think to make homemade play dough -- just a few pantry staples makes a natural version of the toy that kids have loved for generations.

Roasting pumpkin seeds makes for a great Halloween activity, and a healthy snack!

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.