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Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

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.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

Blanket forts are a kid classic! Let your child create a âfortress of solitudeâ on his own for reading, telling scary stories or for cozy cocooning.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

This easy at-home experiment is a great way to "see" science.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

This Mother's Day, mix in some fifth grade science learning to create this fabulous fudge!

Incorporate some math and science thinking into your annual fall fun with this pumpkin investigation activity! Your child will have a blast investigating various ways of measuring pumpkins, making estimates, taking measurements, and recording their findin

If you're looking for something to keep your kid busy on a warm day, and give him some writing practice in the process, bring on the mud!

Help your child create a magical miniature garden in the most unlikely of places: a recycled plastic bottle!

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

This activity is a great way to teach kids that, to find examples of science in action, they donât need to look any further than their own backyard.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

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

Follow in the footsteps of movie character legends as you walk your little one through the steps of becoming a junior archaeologist.

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

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

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

How much water comes out of snow? Explore this timely question with your kindergarten scientist with this easy winter experiment.

This activity is a fun way to "go fishing" with your preschooler, while learning about the concepts of freezing and melting.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

Try this fun garden graphing project with your kindergartener this summer to give him a leg up in math and science while spending some valuable time outdoors!

Slip some science into storm watching with a homemade rain gauge!