Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

Consult astronomers for opinions and advice. Devise a mathematical argument regarding the probability of other planets supporting extra-terrestrial life.

This fun middle school science fair project idea helps student discover the concepts behind deep sea diving and how Cartesian divers work.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Discover the interactions of synthetic dyes and natural dyes on natural and artificially-made fabrics.

The goal of this fun science fair project idea is to microwave candy and investigate: do some colors of M&Ms melt faster than others?

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

This classic children's game demonstrates how sound travels through air vs. through a solid.

How do organic materials become soil? This science experiment measures what materials biodegrade.

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.

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

This science project challenges students to take learned information about weather and climate control and apply it to come up with creative ideas of their own.

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

Learn about lateral earthquake motion and its effect on high rise buildings in this simple 4th grade earth science experiment.

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

In this science fair project, students test how objects float and sink in liquids of different densities.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

In this science fair experiment, kids will use the acid test to discover how to tell one mineral from another.

Science fair project that determines whether disinfectant sprays or disinfectant soaps are more effective at removing bacteria from hands.

The purpose of this science project is to determine whether the amount of air in a soccer ball affects how far it goes when kicked.

In this cool elementary school science fair project idea make a model to learn what happens to the Earth's surface when ice moves over land.

Kids learn how fiber optics work with a dramatic total internal reflection experiment using a fish tank, water, and a laser pointer.

This project explores how well couples convey complex emotions such as envy and pride to one another solely through the sense of touch.

Explore if planting seeds in a certain direction will affect how fast it germinates.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

Determine whether people can actually taste the difference between âhealthyâ cookies and the traditional version.