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

In this simple circular motion experiment, you'll observe tangential velocity and learn about how acceleration and centripetal force affect an object.

Kids will learn about insulation, heat conduction, and the economic benefits of energy efficient windows in this cool science fair project.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

This science fair project teaches students the differences between fruits and vegetables.

With a clear bottle and a few plastic straws, you can easily make a hummingbird feeder and demonstrate the effects of atmospheric pressure at the same time!

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

Do you think heat can affect a plant's growth rate?

Take a look at forensic science with your child. She'll learn how to take a shoe impression, just like the detectives do!

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

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

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

Believe it or not, images that are cast upon your eye's light-sensitive screen (called the retina) are upside down. Here's a fun, fast experiment to prove it!

This science fair project idea explores whether there is a connection to the color a person wears and the way their emotional state is perceived by others.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

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

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

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

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.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

This science fair project idea identifies clouds as a means of predicting the weather.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

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

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

This science fair project idea researches the effects of acid rain on plant growth.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.