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

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

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

I scream, you scream, we all scream for homemade spearmint ice cream!

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Help your curious third grader construct a dazzling spinning wheel that will teach him about the science behind colors while providing some silly entertainment!

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

This science fair project idea demonstrates that plants give off water.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

Let your young scientist explore a brave new world of sound with an experiment that just requires a handful of common household items.

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

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 teaches students about wilting and browning of salad greens.

This science fair project idea explores whether white light can be separated into different colors.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

Try the classic balloon-on-the-wall trick with your kid and watch static electricity in action.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

Test whether plants can grow without sunlight and water.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

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!