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.

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

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

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.

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

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

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.

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.

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.

This science fair project idea explores whether talking to a plant will help it grow.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

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.

Which do you prefer: real or artificial? Try this sweet little taste experiment to help your kids develop a better awareness of the food they consume.

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

This activity will introduce your child to the four different components of blood and give him a fun way to visualize its properties.

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.

Here is a quick experiment you can conduct at the playground to introduce or reinforce the concept of Newton's First Law, The Law of Inertia.

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.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

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

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.