This science fair project idea explores discover whether there are any patterns or trends in the memories between different genders.

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

This science fair project idea produces varying pitches of sound.

Science fair project that measures the relative times it takes a plastic bag and a biodegradable plastic bag to decompose.

Place mushroom caps on poster board, label samples. Check beneath mushroom caps for "prints" of spores. Record and interpret prints left behind.

This fascinating science fair project explores eye color genotypes.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

This science project examines the thermal properties of several major greenhouse gases.

Can you stain teeth with tea, coffee, or coke? Explore how in this science fair project idea.

In this experiment, you will find out how human error can cause faults in any science task. This includes experiments conducted by famous scientists also.

This project concerns activity happening millions of miles away, on the sun.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.

Kids learn about Brownian motion, diffusion, and how temperature is a key factor affecting the rate of diffusion in this cool science project.

Determine if âdouble dippingâ chips really spreads more germs than dipping only once per chip.

Start your toy engines -- this is going to be a fast and friction-filled race!

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

Is the birthday paradox really a paradox, or just an intriguing problem that defies intuition? Find out with this birthday paradox science fair project.

Science fair project in which you will graft branches from different fruit tree onto a root stalk.

Learn about the horizontal and vertical motion of a projectile in this cool physics science fair project idea for advanced middle and high school students.

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

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

In this project children practice the scientific method while playing with puffy paint.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

Explore this fun science fair project idea to investigate different microclimates in and around your home and their effects on the plant and animal life.

This science fair project idea studies whether a religious sleeping schedule relates to a higher IQ.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.