Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Test for a correlation between perceived color and heart rate. Using a stethoscope and stop watch, measure the heart rate (beats per minute) of volunteers.

Test ability to distinguish between natural and artificial aromatherapy oils. Select fragrance, natural and synthetic sample. Volunteers state preference.

Learn about the anatomy of the autonomic nervous system and its relationship to the rest of the body.

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

This science fair project evaluates which sense produces the fastest response time: hearing, touching, smelling or seeing.

Science fair project idea examines different techniques for memorization. Analyze results of memory tests to determine which method is most effective.

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

It's the day before the test, and you still have a ton to memorize! Sound familiar? Test memorizing techniques to help yourself out next time.

This social science experiment endeavors to determine whether certain types of animals provide greater physical and mental health benefits to their owners.

Compare different remedies for cooling the mouth after eating spicy food.

Test the effects of left and right handedness on writing speed and penmanship. Volunteers hand-copy the same paragraph of text, which samples look neater?

This project examines who can jump higher, boys or girls, younger people or older, and how these two factors, gender and age, interact with one another.

Compare the whitening abilities of four different brands of whitening toothpaste to see which one whitens the fastest and which one whitens the most.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

This experiment will evaluate how texting and talking on cell phones influence reaction time.

In this science fair experiment about recycling, demonstrate how the wax from a candle can be reused to make another candle.

Examine whether males or females are more likely to have a higher center of gravity.

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

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

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

This science fair project explores how salt and sugar affect the melting rate of ice in water.

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

Discover whether eating certain foods will make you smell (not only bad breath) but through skin cells.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

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

Construct batteries that make electricity from fruits with this fun science fair project.

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

Get a cool science project idea on a photovoltaic cell and explore the various factors that affect the energy output of the photovoltaic cell.