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Create uphill flow of water by using a siphon. Create vacuum by suctioning one end of tube, and submerge it under water. Watch the direction the water travels.

Is there any correlation between hot tubs and high blood pressure? Kids discover the answer (and its biological basis) in this cool science fair project.

Help your child explore chromatography, which is the process of separating colors or pigments, and create a neat art project in the process!

Young physicists learn about apparent weightlessnessâthat weird sensation you sometimes feel in elevators, turbulent airplanes, and roller coasters.

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

This experiment explores the most common colors that appear among a sample of crossbred guppies.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

This science fair project idea tests whether it is true that humans are in the morning than later during the day/night.

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

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

This conservation of energy demonstration shows why the first hill is the highest on a roller coaster. Learn more about potential and kinetic energy!

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

Test whether spot magnets can help improve the symptoms of an injury.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

This science fair project idea determines the probability of a coin landing heads or tails.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

Check out this cool science fair project idea to explore the relation between onions and eyes and how to prevent eyes from tearing while cutting an onion.

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.

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

This science fair project teaches students about wilting and browning of salad greens.

The purpose of this science fair experiment is to investigate whether the color of your hair affects how much static electricity is carried.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

This science fair project idea identifies and understands adaptations in birds.

Discover which method for odor removal words the best for stifling refrigerator odors.

Observe which kind of fresh long-stemmed flower will last the longest after being picked.

Learn about the greenhouse effect- and get great science fair experiment ideas. Read more.

In this fun experiment, we'll find out how color affects heat absorption!

In this science fair project, students test how objects float and sink in liquids of different densities.

This project examines whether humans can intuitively grasp numeric values greater than three.