This science project allows students to study the psychology of happiness.

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

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

This fun science fair project idea helps students learn how acid rains are formed and explore how acid rain damages the environment.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

Roasting pumpkin seeds makes for a great Halloween activity, and a healthy snack!

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.

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.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

This science fair project idea determines the most effective method of preserving food.

Show your child how to concoct a simple duo of household ingredients that changes color as acids and bases are added!

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

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

Here's a fun at-home activity that will help your child strengthen math skills using high and low temperature data, and become a master temperature tracker!

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

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.

This project examines what types of objects burn and which burn faster and cleaner.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Help your child understand surface tension by showing them how they can create a "skin" on top of water.