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Determine whether carpet placed on a lawn will kill grass and weeds. Choose an area of lawn that you would like to remove, record grass that is dead or dying.

Determine if picking up fallen food in 5 seconds or less prevents the transfer of bacteria from the ground.

Science fair project that determines what percentage of air is made up of oxygen by examining the chemical reaction between oxygen and rust.

Which battery lasts the longest? In this science fair project, kids will test popular brand name batteries like Duracell and Energizer against generic brands.

Demonstrate the capillary function in plants by adding food coloring to glasses of water. Slice stalks of celery and leafy tops. Compare color of leaves

This science fair project idea explores what common compounds can be easily separated out in a centrifuge.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

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 determines whether the older population prefers darker, duller colors rather than bright and lush colors.

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

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

Can you win a staring contest? Would your performance be influenced by your eyesight? Find out in this science fair project idea!

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

In this project students learn about the golden ratio and investigate if it can be used to predict people's assessment of beauty in others.

Help your kindergarten science maven explore the water cycle without getting everything wet.

This science fair project idea explores how water and ice can change the form of rocks.

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

This project explores differences in people's reactions to images in color and images in black and white.

Tin can phones offer something modern versions don't—a fun project to make with a friend, and a dramatic illustration of vibration and sound waves.

This project investigates whether chewing gum can help a majority of people with focus and concentration.

This science fair project studies whether DSLR and Point-and-Shoot cameras work the same way under all conditions.

Why are some pennies shiny and others dark and dull? Find out with this cleaning copper coins experiment, which transforms dark pennies to bright ones.

What better way to nurture your child's imagination than by making a fairy house out of materials found in nature!

Learn the anatomical and physiological differences between central and peripheral visual systems.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

Experiment with the wonders of pressure and condensation by crushing a soda can with nothing but air and water!

Explore properties of liquids and how temperature and salinity effect surface tension of liquids in this fun- filled science fair project idea.