This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.

Science fair project in which you will graft branches from different fruit tree onto a root stalk.

Check out this fun leaf chromatography science fair project idea for middle school students and discover the hidden pigments in leaves.

Science fair project that examines how light wavelengths affect photosynthesis in the aquatic plant: Elodea.

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

Science fair project in which you will build your own algae photobioreactor which will meet the physiological requirements of algae for maximum growth.

Science fair project that examines the biodiversity of ant populations in various locations.

Cleaning can be a chore, but not with this sudsy experiment!

This science fair project examines whether ocean water can be made safe to drink.

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

Ethanol can be used as an alternative fuel! The purpose of this experiment is to identify a starch plant that produces the largest quantity of ethanol.

Kids learn about the color rendering index by finding the best lightning for makeup in this fun and original physics science fair project idea.

What does yeast eat? Sugar, of course. But yeast also has some powerful enemies in the form of antifungal agents! Kids test them out in this fun yeast lab.

Science fair project that compares tree leaf size and shape based on the leaf's position in the tree. Is their is a noticeable difference between high and low?

Combine your child's natural curiosity with his developing classification and writing skills by helping him create a backyard field guide.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

Give your child an introduction to food preservation by making and canning your own yummy, homemade pasta sauce!

Formulate a hypothesis and use the scientific method to determine the guess what is hidden in a box. Test abilities of volunteers, without opening box.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

In this Bernoulli's Principle experiment, you'll learn how an increase in the speed of a fluid, like air, decreases pressure.

Investigate the different ways in which objects and organisms can be classified, create your own. then have volunteers classify using their own systems.

introduction to organic chemistry. study what happens when polymer molecules are mixed with borax solution.

Do dogs understand English? Kids will find out with one of our favorite dog science fair projects that tests how dogs process human language and other cues.

Measure the effectiveness of detergent containing a UV-absorbing compound in blocking UV-A radiation. Use black light and UV detecting beads.

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

The goal of this science fair project is to evaluate the effect of heat on sound wave frequency.

Planning a beach vacation? Here's a cool nature craft you can make in the sand with your child.

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

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.