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How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

Science fair project that uses distillation to convert salt water into fresh water.

Examine the effect of pressure on carbonation in soda.

This science fair project idea investigates food preference of birds.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

How does mold grow? Kids find out by testing different conditions to measure mold growth rate and learn about what factors cause mold to grow more quickly.

Examine how the tire treads of a bicycle affect its rolling frictional force. Change tires, test speed performance on different terrains.

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 investigates whether plants can survive being frozen.

In this science experiment, test the pH of soil surrounding a gas station to determine if gas stations have a negative effect on the environment.

Explore convex and concave objects and how they reflect light.

This experiment will use computers to examine how the famous Mandelbrot set can be manipulated in fractals.

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

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

This experiment explores how listening in to a one-sided conversation affects concentration.

What kind of fabric holds dye best? How can you improve a dyed fabric's colorfastness? In this colorful project, test colorfastness using mordants and bleach.

This science project examines the effectiveness of various types of laundry detergents on stains trapped on a white handkerchief.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

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

Wind is an important source of renewable, green energy. The purpose of this science fair project is to build and operate a windmill generator.

This science fair project idea demonstrates how our fingers prune when in water.

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

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

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Become familiar with ratios and learn how to measure the diameter of the Sun and the Moon in this fun science fair project idea.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

This science fair project determines the quality of a given product.

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

Science fair project which evaluates different athletic shoes in order to find out whether any of them affect a person's ability to run.