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.

Learn how the focal length of a lens affects a magnifying glass's magnifying power in this cool science fair project idea for 8th grade.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

This fun science fair project for 8th grade demonstrates what Kepler's 3rd law predicts about a planet's orbital period and its distance from the sun.

This experiment evaluates how a diet that is rich in "mood-enhancing" foods affects the way people feel over several weeks.

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

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

This project examines Newton's First and Second Laws of Motion with a bicycle and water balloons.

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.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Find out whether people within a family tend to have matching fingerprints.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

This experiment evaluates whether the phenomenon of "choice blindness" occurs more often with men or women.

This project examines whether more expensive golf balls translate into better results on the golf course.

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

Store bowls of fresh fruit in differently lighted environments. Contrast freshness based on appearance.

This science fair project evaluates if and how eating a large meal affects ability to perform mental tasks.

.Have you ever had problems with your wifi signal strength? In this experiment you will learn about how wireless signals pass through the air and solid objects.

This project determines whether hands-on practice, mental practice, or no practice leads to better shooting of free-throws.

How clean is the air we breathe? The answer might surprise you. Learn how to investigate local air quality with this cool science fair project.