This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

This project examines whether people's taste perception is influenced by what they see.

Science fair project which teaches you how to make your own homemade glue by combing curdled milk with baking soda.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Find out whether a longer airplane will fly farther or a wider paper airplane.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

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

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

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.

You've heard the expression "burn rubber" but do you know how heat affects rubber? Examine the impact of temperature on rubber in this fun science experiment.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

In this science fair project, students will try to discover if test subjects can detect the presence of Monosodium Glutumate (MSG) in food.

This science fair project idea determines what household items are good conductors of electricity.

In this cool catalase and hydrogen peroxide experiment, kids put a potato in a jar of hydrogen peroxide to see how catalase acts as an enzyme.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?