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In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

Demonstrate how to tell the age of an egg without having to crack it open.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

This science fair project idea explores whether talking to a plant will help it grow.

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

This fun science fair project idea helps students learn how acid rains are formed and explore how acid rain damages the environment.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

Discover whether cold or hot water from the faucet will boil faster on the stove.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

Examine the effect of pressure on carbonation in soda.

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.

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

Kindergarten algebra is a lot different than high school. In kindergarten math, algebra means grouping like things, or noticing what doesn't belong in a set.

Here's a fun activity to help build thinking skills in young first grade scientists, and to encourage them to have a blast exploring the mass and volume.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

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!

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

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

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.