What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

Kids learn how to make a simple electric motor in this great engineering science fair project that teaches them how current generates its own magnetic field.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

introduction to organic chemistry. study what happens when polymer molecules are mixed with borax solution.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

Test of the effect of exercise on rote memory. Prepare a single list of 40 randomly chosen words. Have volunteers recall as many words as possible.

Science fair project that explains and demonstrates the parallax principle.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

Determine the maximum distance traveled by projectiles launched at an angle. Use some cool math to figure out at which angle your projectile will go farthest.

Alive or not? This yeast experiment you can conduct with your little scientist explores the answer to this timeless question.

The purpose of this science project is to determine which stimulus, gravity or water, will cause the greatest growth response in a plant.

This science fair project idea explores if an LED light can be powered by vegetables and/or fruits.

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

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

Multiple-choice test questions can be confusing. Here's a toolbox of tricks and strategies to help your teen become a multiple-choice master.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

Teach kids about a fun way they can remember this more efficiently- the power of mnemonics. Kids will be amazed.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

Check out this cool science fair project idea to explore non-chemical means of preserving fruits by using thermotherapy.

Discover whether cheap saline solution bottle cleans and disinfects just as well as more expensive kinds formulated with different ingredients.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

Here's a math, science, and social studies activity: help your kindergartener become a "coin archaeologist" by examining how different coins look and feel.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

This science fair project idea shows kids how to grow mold and whether mold grows better in dry or moist conditions.

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.

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.