Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

This science fair project idea determines whether dogs can be trained faster using a food reward or praise.

Help your first grade scientist learn about metamorphosis by observing the life cycle of some interesting creepy crawlies.

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

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

Teach your first grade scientist the difference between liquids and solids using maple syrup.

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

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.

In this science fair project, students make their own rain gauge to measure rainfall.

Learn to solve a crime scene investigation using an important forensics tool: oblique lighting.

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

How fast is the wind blowing? This science experiment provides step-by-step instructions to help you answer this question.

This science fair project idea identifies and understands adaptations in birds.

This fun, think-outside-the-box activity introduces kids to gravity and other basic scientific concepts as they construct an impressive marble run!

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.

What happens when eyes see something that the brain knows cannot be true? In this science activity, the brain has to "fudge" it when interpreting what you see.

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

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

Teach your fifth grader about the wonders of wind by making and observing this winter wind chime.

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.

Check out this hot project idea to culture bacteria and determine if the claims about the anti-bacterial properties of curry and cinnamon are true.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

Sure, you already know that water is made up of hydrogen and oxygen, but did you know that oxygen levels differ in different types of water?

Science fair project that evaluates how well clothing fabrics block UV radiation by examining the properties of different fabrics.

Kids learn about Brownian motion, diffusion, and how temperature is a key factor affecting the rate of diffusion in this cool science project.

Compare ability of selected materials to block UV-A radiation. Shine black light though glass at detecting beads underneath. Note color intensity.

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

In this science fair project, students use hot and cold water to simulate what happens when a warm front meets a cold one.