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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.

This science fair project idea determines if the temperature of rubber effects how high it bounces.

Your child will learn science and make a fun new malleable toy with this balloon sandbag science experiment.

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

In this design challenge, your child will create a parachute for a small toy using typical household items.

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.

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

Have your child kick off their summer vacation by making a miniature water slide!

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

Here's a fun science experiment that's refreshingly tasty too! Turn regular water into a tasty treat perfect for consuming on a hot day.

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

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

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

Stir up some enthusiasm for experimentation with this candy-cracking science experiment!

Come take off your shoes and explore with your feet. Your child will embark on a barefoot adventure as he plays with different textures.

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 idea produces sounds by creating vibrations using different objects.

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.

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