In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

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

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

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

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

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

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!

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

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

Examine the effect of pressure on carbonation in soda.

In this fun activity, your child will create their very own solar oven to bake s'mores!

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.

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

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

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

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

Discover whether cold or hot water from the faucet will boil faster on the stove.

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

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

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.

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

This science fair project idea investigates if webbed feet help a duck (and others) swim.