Do human lie detectors exist? Charge up your powers of observation to see if you can tell a lie from the truth.

This science project has students study the idea of human beauty.

Research optical illusions and human auras. Understand why the probable cause of perception is mach bands.

This science fair project idea explores whether the color of surroundings affects human mood.

Do dogs understand English? Kids will find out with one of our favorite dog science fair projects that tests how dogs process human language and other cues.

This science fair project idea determines whether the diet and taste preferences of humans relate to their personality.

This project examines the phenomenon of using a mirror to trick a person's brain into experiencing sensations in body parts not actually affected.

This construction paper activity helps your child to assemble a variety of emotions on a face so she can recognize how she and everyone around her is feeling.

This science fair project idea explores discover whether there are any patterns or trends in the memories between different genders.

This science fair project idea determines whether volunteers remember more information presented orally or visually or kinesthetically.

This science fair project idea studies whether a religious sleeping schedule relates to a higher IQ.

This science fair project idea discovers the average time it takes for a person to remember something completely.

Explore whether pianists have the tendency to type faster than non-pianists.

In this science fair experiment, middle school students evaluate whether tone of voice can influence our ability to remember a list of everyday objects.

Science fair project which determines whether people are more likely to follow rules if they are easy to understand.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

Explore the world from your own home by conducting research about other cultures with your 4th grade child.

This science fair project idea explores whether there is a connection to the color a person wears and the way their emotional state is perceived by others.

In this science fair project, students evaluate if astrological signs provide clues about people's personalities.

Can you fool your eyes and your brain with an optical illusion? The purpose of this science fair project is to demonstrate various kinds of optical illusions.

This science fair project idea explores if people with cool skin tones prefer cool colors and people with warm skin tones prefer warm colors.

Give your child an American history lesson as you create a colorful mini totem pole!

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

This science fair project idea explores whether color affects a person's emotional state.

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

This science fair project idea compares the cuteness reaction between genders.

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

Children read a famous letter from the American Civil War, then write a response, in this thoughtful history activity.

This project is about after-images and what possibly affects them.

This science fair project idea examines whether boys and girls differ in reflexes.