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Check out this cool middle school science fair project idea to determine if shopping carts are really carriers of harmful bacteria.

Check out this fun science fair project idea to measure bacterial colonies from door handles and explore the effectiveness of different cleaning agents.

Demonstrate that insects observe colors and choose favorites. Place colored pieces of construction paper on a flat, glassy surface, observe bug preference.

Discover whether eating certain foods will make you smell (not only bad breath) but through skin cells.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Find out the differences (if any) in the frequencies of voices produced from a computer, from a phone, and directly coming out of the voice box of a human.

Explore the effect of wind speed on the burning rate of a candle.

Demonstrate Newton's laws of motion by examining the relationship between mass, force, and acceleration during free-fall.

Help your fifth grader embrace the roots--literally--of Mother's Day by growing carnations to honor mothers in you family's history.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

Science fair project that uses iodine solution to demonstrate how starch is turned into sugar when it is chewed in the mouth.

How powerful is the reaction between baking soda and vinegar? Find out here!

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

Some fossils have been been preserved for billions of years! Help your kid understand how fossils are created and preserved with this crafty project.

In this activity, your child will learn about a style of gardening that uses moss, also called "kokedama."

Help your child plant a "tea garden": a garden made of herbs for making teas.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

In this science fair project, students create their own miniature salt flats at home.

This awesome diffraction grating experiment puts high school students' applied math skills to the test by having them calculate the wavelength of laser light.

In this science fair project, students investigate how different colors influence appetite.

In this science fair experiment, middle school students evaluate whether tone of voice can influence our ability to remember a list of everyday objects.

This experiment will evaluate if the environments that people work in affect their speed and accuracy in performing mental tasks.

This science fair project examines how seeds hitchhike on animals and clothing.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

Perk up your front porch with this hanging vase craft, perfect for spring and for getting kids outdoors!

Show your middle schooler how a quick whirl of spinach in the blender will reveal the cobwebby "stuff"--or DNA--of life!

Help your child measure breezy weather in her environment by making a wind vane for kids, a simple version of the classic scientific measurement tool.

Learn how to make marbleized paper with simple everyday ingredients in this fun activity! Your child will learn about oil and water while doing this project.