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

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.

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!

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

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.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

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

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.

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

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

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 explores whether talking to a plant will help it grow.

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

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

Help your child create a working lung model that fills with air just like the lungs inside of his own chest when he breathes.

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 kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

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.

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.

This science fair project idea explores whether white light can be separated into different colors.

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

Learn the basic structure of a DNA strand, which is the double helix, how genes form together, and the resemblance DNA has to a twisted ladder. Create a model.

Encourage a group of third graders to play this fun game of Whistle Hide-and-Seek as a warm-up to get them prepared for finding a "lost" camper.

This science fair project idea investigates the difference in reaction times between boys and girls.

Stir up some enthusiasm for experimentation with this candy-cracking science experiment!

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

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

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