Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Explore the concept of receptive fields and why different parts of our body have different levels of sensitivity.

Salmonella and E.coli are common food contaminates. This experiment measures the time it takes for E.coli and Salmonella to reach hazardous levels in fish.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

Sure, you already know that water is made up of hydrogen and oxygen, but did you know that oxygen levels differ in different types of water?

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

This cool electricity project teaches kids how connecting batteries in series vs. parallel circuits can contribute to different levels of voltage and amperage.

This basketball project explores the best way to make the perfect shot every time.

In this experiment two environments will be compared: a room with interior design that uses correct Feng Shui versus one with incorrect Feng Shui.

This experiment investigates if stress alters body temperature.

It has long been believed that weather influences mood and behavior. This experiment will evaluate if weather can really impact the way people feel.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

This experiment investigates if small changes in your diet can alter your basal body temperature.

This science project investigates the influence of different genres of movies on appetite.

In this science fair project, students investigate how different colors influence appetite.

This experiment investigates whether the psychological phenomenon of the halo effect can be used to explain people's perceptions of others.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

This project examines whether sugar substitutes are as sweet as real sugar.

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

Test the combustion of different types of woods.

This experiment evaluates if people of a specific gender or age more likely have an elevated number of taste buds, allowing them to taste what others cannot.

This science project challenges high school students to study the linguistic evolution of text messaging.

This social science experiment endeavors to determine whether certain types of animals provide greater physical and mental health benefits to their owners.

Looking for a fun project on energy? Check out this fun elementary school science fair project idea that demonstrates chemical energy in a bottle.

In this experiment, students create music with subliminal messaging to try to influence people's decision-making.

This experiment will evaluate if the environments that people work in affect their speed and accuracy in performing mental tasks.

This experiment evaluates if the temperature of the environment that you work in affects your ability to perform mental tasks.

This project will explore whether test subjects, deprived of points of reference, will, in attempting to walk a straight course, walk in circles.