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!

This science fair project idea discovers which parts of the body are more sensitive to touch than other parts of the body.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

This science fair project focuses on the use of the enzyme amylase found in human saliva to break down starch into sugar.

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

Make a backbone model to explore human anatomy and life science.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

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.

By using static electricity generated from their body, a child can cause a small fluorescent lamp bulb to light up!

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

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 idea explores whether talking to a plant will help it grow.

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.

This science fair project idea examines liquids of different densities.

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

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.

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!

This science fair project idea experiments with spinning color wheels and optical illusions.

The objective of this science fair project is to investigate salt water density.

This science fair project teaches students the differences between fruits and vegetables.

This science fair project idea investigates whether air has mass and weight.

The purpose of this science fair project is to build a basic radio.

This science fair project idea determines which method of hand cleansing is the most effective.