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.

Science fair project about different digital image file types, compares different encoding algorithms used to compress the data.

Science fair project that examines condensation and the conditions needed in order for dew to form.

Cleaning can be a chore, but not with this sudsy experiment!

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

This project examines the amount of saltwater required to affect the growth of plants and subsequent effects on growth and development.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

This experiment will explore the best way to create a perfect soft-boiled egg.

The goal of this project is to create an exciting topographical map out of dough.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

The purpose of this science fair experiment is to investigate whether the color of your hair affects how much static electricity is carried.

The objective of this science project is to determine whether the brain first processes colors, shapes, or words when given conflicting messages.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

This science fair project determines the quality of a given product.

This baseball science fair project explores the concept of an object's center of percussion to determine if the "sweet spot" has a scientific basis.

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

This project examines whether humans can intuitively grasp numeric values greater than three.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

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.

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.