The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

Learn about lateral earthquake motion and its effect on high rise buildings in this simple 4th grade earth science experiment.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

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

Learn whether writing things down really makes things easier to remember.

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

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

Will increasing the amount of salt in water effect how slow or fast the water freezes?

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 cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

This science fair project idea investigates if fats add to the flavor of food.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

This science fair project idea examines which type of insulation holds in the most heat.

This science fair project idea explores the different properties of matter.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

Using a toy race car kids create a visual model of the Doppler Effect.

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

Help your child learn about animal classification with this fun and delicious activity.

Put a twist on traditional oil painting with this fun science activity that you and your first grader can do together.

Are your taste buds up for the challenge? Put tongues to the test with this science fair project that examines who enjoys sour flavors more, adults or kids?

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

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

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

This activity is a great way to stretch the boundaries of your child's imagination and build up important critical thinking skills.

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.

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

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.

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