This science fair project idea investigates the difference in reaction times between boys and girls.

In this fun guessing game, your child uses his sense of smell and taste to figure out what is in the container. Here's how to play:

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

In this science project idea learn about working of different types of smoke detectors and find out which one is the most effective for you.

Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.

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

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

Check out this cool middle school science fair project idea to determine if shopping carts are really carriers of harmful bacteria.

Science fair project that tests the effects of temperature change on the reactivity of the catalase enzyme.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Free science fair project idea that examines cheating in school-age children. Project involves a task in which children are tested on various tasks.

Check out this cool science fair project idea to explore the relationship between pulse rate and blood pressure in healthy people.

Check out this cool science project idea to explore how temperature creates annual rhythms that govern plant growth.

Challenge your learner to design and build a city of their own in this creative engineering activity.

Administer IQ tests to volunteers. have one group practice typical IQ test problems. Then compare results of the two groups.

Construct batteries that make electricity from fruits with this fun science fair project.

Kids will make a homemade electroscope and explain how it detects static charges through induction in this fun science fair project idea.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Science fair project that determines whether brain size is correlated with intelligence.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

Science fair project that creates a pamphlet to help others learn about Epilepsy, its causes, symptoms and treatments.

This science fair project idea raises awareness of a real ecological issue.

Science fair project that determines how we can change potential energy into kinetic energy.

Can playing video games trigger an adrenaline rush even though there's no real danger? In this cool experiment you'll learn all about how fight-or-flight works!

This baseball science fair project explores the concept of an object's center of percussion to determine if the "sweet spot" has a scientific basis.

Check out this fun science fair project idea to learn how alkaline batteries convert chemical energy to electrical energy?

Use a dichotomous key to identify plants or animals.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.