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This project examines who can jump higher, boys or girls, younger people or older, and how these two factors, gender and age, interact with one another.

Would you be able to tell the difference between colored contacts and natural eyes from a normal distance? Find out in this science fair project!

Design and build a scale model representing living tree architecture. Then build a full-size version using one or more lives trees, and test your creation.

Using plants and other items from the outdoors and clothing they already own, your kids can dress up as any one of the four seasons or simply as a Garden.

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.

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.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

In this science fair project, students will use four different household objects to see which ones form the most or best crystals.

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

This activity will help your child review science concepts, learn new ones, and become familiar with examples of various concepts in science. Plus, it's fun!

Explore the neural and mental mechanisms at play in mental imagery.

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

In this science fair project, students investigate the applicability of Benford's Law to many sets of everyday data.

Find out whether pacing in long-distance running actually acquires for drastic changes in finishing times versus running super-fast at the start.

Look at people's face shape. Do you think their face shape affects your perception of kindness? Find out more in this science fair project idea!

Do heavier objects fall faster than lighter ones? Students learn the answer by watching the effect gravity in a vacuum has on a coin and a feather.

Learn about the factors that influence group conformity.

Can the force of air be used to propel a vehicle? This science experiment provides step-by-step instructions to help you answer this question.

Learn about our response to scents that existed in our environment over evolutionary time and consider why scents might affect our mood state.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

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

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

Science fair project that determines the relationship between the temperature and the rate of cricket chirping. How many times do crickets chirp each minute?

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

Slip some science into storm watching with a homemade rain gauge!

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

This science experiment has students test whether a snail moves faster on concrete or dirt.

Science fair project that teaches you key definitions of molecular science, and how different isotopes of an element affect the relative atomic mass.

Why are some pennies shiny and others dark and dull? Find out with this cleaning copper coins experiment, which transforms dark pennies to bright ones.