This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

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.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

In this activity, your child will be challenged to make a tower using paper cups.

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!

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

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.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

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.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

The goal of this science fair project is to demonstrate different ways to generate static electricity and record its effects.

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.

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