This science fair project idea explores whether color affects a person's emotional state.

In this physics project, you'll learn how to find the maximum height of a projectile using some math and trigonometry.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

Science fair project in which you will create your electricity by making a homemade battery using salt water, a nail, and a copper wire.

This science fair project idea determines which brand of batteries have the longest life.

Science fair project idea examines different techniques for memorization. Analyze results of memory tests to determine which method is most effective.

This science fair project explores how salt and sugar affect the melting rate of ice in water.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

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 science fair project idea studies whether eating a hearty breakfast before and exam will get them better test scores.

Make stunning pendulum waves and learn the math behind the patterns generated with this cool and easy science project.

This science project challenges students to study the salt content in tap water and learn about electrochemistry.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

Determine the effect of homework on academic performance. Collect grade info at the end of a semester, determine correlation between grades, amount of homework

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

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

Free science fair project idea examining how different types of water affect plant germination and growth.

Find out whether matte or shiny nail polish lasts longer.

Check out this cool and free middle school science fair project idea on how to make a solar oven.

Kids build a rainforest food web to explore trophic levels in this cool science fair project for 4th grade.

This science fair project idea investigates whether body language and heart rate can decipher who's lying and who's not.

Store seeds under three different environmental conditions. Plant seeds in carefully marked groups, watch them grow. Compare results.

Science fair project that creates fog using bottles of hot and cold water.

Kids make an electromagnet in this electromagnetic induction experiment to learn about induction, current, and the right-hand rule.

This free science fair project explores the "dirty" relationship between the presence of organic material in soil and water absorbency.

This project explores ways to prevent static electrical shocks.

Devise list of randomly chosen words, test how many words volunteers can remember. Compare results of adults and children. Which have better memories?