Find out whether a longer airplane will fly farther or a wider paper airplane.

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

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

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

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

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

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 science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

This basketball project explores the best way to make the perfect shot every time.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

Dinosaurs were huge creatures that left behind huge footprints that lasted for millions of years. In this science fair project, kids learn how dinosaur tracks were left behind!

This science fair project idea examines the reason boats are shaped and engineered.

Can you fool your eyes and your brain with an optical illusion? The purpose of this science fair project is to demonstrate various kinds of optical illusions.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

This science fair project idea produces sounds by creating vibrations using different objects.

Science fair project idea examines validity of mood ring predictions. Analyze accuracy of results, consider the impact of temperature

Learn about the power of exponents. The objective of this science fair project is to explore and understand how exponents are used.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.