Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

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

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

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.

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!

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

The goal of this project is to create an exciting topographical map out of dough.

Slip some science into storm watching with a homemade rain gauge!

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

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

Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

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?

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

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

In this science fair project, students make their own rain gauge to measure rainfall.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Clouds are formed when warm and cold air meet. Here's a way for kids to see it all up close!

This science fair project idea investigates how the shape of an object affects drag.

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.

This science experiment has students test whether a snail moves faster on concrete or dirt.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

Start your toy engines -- this is going to be a fast and friction-filled race!

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.