The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Test your friends to find out if you can replicate the placebo effect's incredible results.

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

This science fair project idea's objective is to become familiar with items your family regularly throws in the trash.

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

In this science project, the center of gravity is explored.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

This science fair project idea teaches to understand and explore the concepts of crystal formation and dissolving substances.

This science fair project enhances the understanding and awareness of energy use and explores the concept of energy efficient.

The project investigates how friction affects motion by using different surface textures.

The project investigates how water and movement affects erosion.

In this project, sunlight is blocked from a leaf in order to see the affect that sunlight has on leaves.

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.

In this project, different brands of microwave popcorn are tested and compared.

This science experiment has students test whether a snail moves faster on concrete or dirt.

In this project, the affect of acid rain is simulated by the acid, vinegar.

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

In this project, waves of vibrations are experimented with using water in glasses.

In this investigation, an oil spill is simulated in a jar to observe the damage that oil spills have on the ocean and ocean life.

This science fair project idea explores the egg's thin membrane.

This science fair experiment idea's objective is to understand the general concept of an acid and a base.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

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

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.