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.

Your kid will delight in creating an extraterrestrial vehicle from goods found around the house. There's no telling where her imagination will go!

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

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

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

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

Construct and experiment with a periscope using reflected light rays to gather an image.

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!

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

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.

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.

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.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

Give your child an introduction to food preservation by making and canning your own yummy, homemade pasta sauce!

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

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!