In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Help your third grader practice his writing skills and learn to operate household appliances like the washing machine or DVR with this Family How-to guide!

Want to reuse materials that would otherwise get tossed in the trash? Show your third grader how to get crafty with old newspaper and fabric.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Crystals are a very special structure. In this third grade activity, your child will learn how to grow salt crystals.

Build second and third grade writing skills by using pictures to help kids "see" how to use details in their stories.

This third grade writing activity brings home the lesson: it's not only what you write that's important, but how you write it, too.

Many kids find themselves especially challenged by writing in third grade. Here's how you can help, using a technique called "storyboarding."

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.

Show your third grader how to string together a pretty, decorative harp.

This science fair project examines how seeds hitchhike on animals and clothing.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

This game turns prediction, a major component of third grade reading, into a fun game.

Practice multiplication facts by playing baseball in this fun, third grade math board game.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

Learn how to make a trick-or-treat bag for Halloween. See how to make a decorative trick-or-treat bag with this Halloween craft tutorial.

Practice multiplication facts and geography at the same time in this fun third grade math card game.

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

This activity teaches your third grader how to make a paper cut-out still life, in true Matisse-style.

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

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.