Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

This science fair project idea determines which method of hand cleansing is the most effective.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

This science fair project idea demonstrates that plants give off water.

Determine if gender affects the ability to identify different smells.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

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.

Learn how to be a bird scientist in this simple project of watching feathered friends in their habitat.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

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

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

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

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.