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In this science fair project, students create their own miniature salt flats at home.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

This experiment will evaluate if the environments that people work in affect their speed and accuracy in performing mental tasks.

This experiment evaluates if the temperature of the environment that you work in affects your ability to perform mental tasks.

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

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 explores discover whether the acidity of sour candy is comparable to that of battery acid.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

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

People have favorite flavors, but what about ants? Which ant food is the most popular?

The objective of this science fair project is to determine whether planaria reproduce asexually by regeneration.

Determine how proficient you are at making estimations and learn how to make more reasonable estimates.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

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

Check out this fun science project idea to measure the amount of vitamin C in ripe, half-ripe, unripe and stored oranges.

This science fair experiment examines the relationship between gender, age, and smiling.

The objective of this science fair project idea is to explore which brands of "anti-fade" shampoos work the best to keep hair color looking fresh.

Kids love the dramatic Mentos and Diet Coke experiment conducted in this awesome science fair project.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Find out whether matching resonant frequencies can cause objects to shatter.

Determine the relationship between the speed of a sound and the temperature of the air it passes through.

Should you use âFITâ Fruit and Veggie Wash or plain water to wash your produce? Find out in this science fair project idea.

Science fair project that tests the correlation between outdoor temperature or weather conditions and the number of visible stars at night.

In this science fair experiment, kids will use the acid test to discover how to tell one mineral from another.

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

This experiment explores whether music affects the growth of bacteria and could help figure out better ways to process sewage and other microbe-assisted duties.

This science fair project idea investigates how different disinfectants work in killing germs.

Research camouflage products and techniques, test quality by timing volunteers. Calculate the average length of time to recognize the subject.