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In this science fair project, students investigate how different colors influence appetite.

In this science fair project, students evaluate if the phases of the moon affect the way people feel.

This experiment evaluates how a diet that is rich in "mood-enhancing" foods affects the way people feel over several weeks.

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

Create a brush pile to help wintering wildlife stay warm and cozy through the winter.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

This experiment uses personality assessments to evaluate if certain personality traits are more common in people with unusual first names.

This science fair project idea creates an underwater habitat and explores the basic needs of living things under water.

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?

This project determines whether hands-on practice, mental practice, or no practice leads to better shooting of free-throws.

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.

This experiment tests which gender is better at catching how a magician performs his tricks.

This project uses toy cars to determine how friction and gravity affect cars and braking.

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

Study the effect of music on blood pressure. Compare blood pressure readings before and after the listening session. Analyze results, write a detailed report.

This experiment will explore if magnetism has any effect on the regeneration abilities of flatworms.

Describe the lives of commercially raised chickens. Contact local chicken farmers for information and advice. Write a detailed report about farming techniques.

This science fair project explores discover whether the acidity of sour candy is comparable to that of battery acid.

How fast is the wind blowing? This science experiment provides step-by-step instructions to help you answer this question.

With this hands-on activity, you'll show how fall colors are hidden in the leaf all year long!

Try this chemistry experiment with your curious kid and get some "shocking" results!

What happens when eyes see something that the brain knows cannot be true? In this science activity, the brain has to "fudge" it when interpreting what you see.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Pair a planetarium visit with this fun art project that mimics the look of far-off galaxies.

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

How do search engines work? What makes various search engines different? This project delves into the world of web crawlers, caching, indexing and algorithms.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

Analytical chemists perform chromatography to separate colors into pigments. Test the food coloring used in M&M's and Skittles candy in this fun project!