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

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

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

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

Explore if planting seeds in a certain direction will affect how fast it germinates.

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

In this activity, your child will learn about a style of gardening that uses moss, also called "kokedama."

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

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

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.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Learn about different fern fronds with your third grader as you create lacy, natural decorations on your Easter eggs this year.

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

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

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.

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

In this design challenge, your child will make a bottle rocket using typical household items.

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!