This science fair project idea examines which type of insulation holds in the most heat.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

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

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Cherries usually burst with flavor, but in this science experiment they burst with osmotic pressure. This science activity will blow your curious kid's mind!

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.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

This science fair project idea explores substances that cause a bubble to last longer.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

Have your child kick off their summer vacation by making a miniature water slide!

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

In this design challenge, your child will create a parachute for a small toy using typical household items.

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.

Introduce your child to the amazing, almost magical phenomenon of static electricity!

This science fair project idea determines what household items are good conductors of electricity.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

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

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

Your third grader will be amazed at the explosive combination of vinegar and baking soda in these chocolate volcano cupcakes with white chocolate "lava."