In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

In this activity your child will create their very own marble maze!

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

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

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

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

Your child can help your family pet take a breather, and help herself relax, too, with this soothing activity.

Test your friends to find out if you can replicate the placebo effect's incredible results.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

Bring a little science to your third grader's Christmas as you test out his sense of smell by exposing him to common Christmas scents found in your kitchen.

In this project students experiment with making music using only glasses of water.

How powerful is the reaction between baking soda and vinegar? Find out here!

Discover flight initiation distance as you play around in the park with this fun bird watching project!

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

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

Develop your child's mathematical and engineering skills with this fun building brick challenge. In this activity, your learner will be challenged to create a boat out of building bricks.

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.