Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

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.

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

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

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.

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.

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

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

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

This science fair project idea investigates how magnetism can defy the force of gravity.

This project examines Newton's First and Second Laws of Motion with a bicycle and water balloons.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

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

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

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

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

In this science fair project, young children notice and track changes in trees throughout the year.

Plants and light seem to be good buddies, but how far does the friendship really go?

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

This project explores whether there is an effect on people, including heart rate and self-expressed mood, when they are exposed to different types of music.

Here is a kindergarten activity that blends art and science by using magnets, paint, and objects found around the house to create a picture.