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.

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.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

Want to help make studying the nervous system a little more fun? This thinking cap is a great way to learn external human brain anatomy.

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

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

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

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

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

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 science fair project idea explores which fruit molds the fastest.

Kids conduct a simple birdseed experiment to figure out what kinds of birds live nearby in this fun science activity.

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.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

Here's a fun at-home activity that will help your child strengthen math skills using high and low temperature data, and become a master temperature tracker!

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

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

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

Explore scientific concepts with this experiment that introduces kids to the scientific method!