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You and your child can create this beautiful butterfly mobile for hanging anywhere in the home (and learn about this magical creature while you're at it).

In this cool experiment, learn about the forces of resistance in a liquid and race marbles in a cylinder to find out which fluids have a high viscosity.

Combine your child's natural curiosity with his developing classification and writing skills by helping him create a backyard field guide.

Do dogs understand English? Kids will find out with one of our favorite dog science fair projects that tests how dogs process human language and other cues.

How does bleach kill bacteria? Kids find out in this impressive bacteria science fair project by testing different concentrations on a safe strain of E. coli.

Learn how acid-base catalysis affects enzymes and enzymatic reactions in this science project.

The objective of this science fair project is to determine the rate at which participants can respond to different patterns.

The objective of this science fair project idea is to find out whether refrigerating cosmetics will extend their shelf-life and longevity.

More height, more steep, more speed! This science project investigates whether there is a correlation between the height of the roller coaster and the slope.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Summer is a great time to work on pre-kindergarten skills that will serve your child well in her first year at school, while having some fun in the sun!

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

Recycling may be a confusing concept for your little one, so take the time to teach them the magic of compost - right in your own backyard!

Here's an arts and crafts activity for preschoolers and pre-kindergarteners: build brick buildings with homemade mud bricks made from dirt and water.

Learn about Ikebana, or the Japanese art of flower arranging, with your child while artfully arranging spring flowers!

Introduce your child to the importance of preserving the world's biodiversity by turning a lesson on endangered species into a fun game for the whole family.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

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.

This experiment evaluates if a noisy environment makes it harder for test subjects to perform tasks that require hand-eye coordination.

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

This experiment explores whether caffeine improves athletic performance.

We're all familiar with the idea that some songs âget stuck in your head.â This experiment explores the validity of that claim.

Determine whether magic salt is more effective at melting snow than regular salt. Pour one ounce of salt over the ice cubes, compare the melt downs.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

Discover whether people can distinguish what a person looks like just by listening to their voice.