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Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

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.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

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

This science fair project idea investigates if fats add to the flavor of food.

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

This science fair project idea explores how length affects the weight a bridge can hold.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

By incorporating natural materials and the powers of observation, your child will become a backyard naturalist while building early writing and drawing skills!

Help your child understand the scientific concept of evaporation with this fun outdoor science activity.

How do organic materials become soil? This science experiment measures what materials biodegrade.

Does your child always demand to know why the sky is blue, how the sun moves across the sky, or where wind comes from?

Slip some science into storm watching with a homemade rain gauge!

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Start your toy engines -- this is going to be a fast and friction-filled race!

Instead of the traditional egg hunt, try this creative variation that will result in a beautiful Easter garden.