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Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

Check out this cool middle school science fair project idea to determine if shopping carts are really carriers of harmful bacteria.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

Demonstrate how we are able to locate sounds, echolocation. Have a blindfolded subject locate you by the sound of your clapping.

Science fair project that tests how well various sunscreens protect skin from the sunâs ultraviolet radiation by measuring their effect on sun-sensitive paper.

This science fair project idea examines the actual cost of three household light bulbs by testing energy consumption.

This experiment evaluates if people have an accurate perception of how much personal time they spend interacting with technology.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Build basic projector out of ordinary materials. Create several color transparency slides, demonstrate your creation.

This science fair project idea explores whether mint, known for its âcooling sensationâ really does lower temperatures.

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

This science fair idea is a great way for kids to explore static electricity. Kids will give a comb a static charge and watch as it separates pepper from salt.

This snowman's not abominable, he's adorable! Your child can bring her very own snowman to life while practicing how to create texture.

This science fair project idea compares the mass and density of objects.

Research and understand basic computer science. Build a simple computer, following instructions found online. Design a new or improved feature.

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

This experiment will explore the possibility of creating an infinite object by hand.

Design and build an invention inspired by Rube Goldberg's designs. Build your invention. Test the machine, write a detailed report.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

Create an organic plastic product using vinegar and cream. Track decomposition over course of several weeks. Compare decomposition with traditional plastics.

Learn the anatomical and physiological differences between central and peripheral visual systems.

Find a mathematical relationship between the intensity of a sound wave and distance from the sound source. Use a pedometer and a sound level meter.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

Your mission, if you choose to accept it, is to construct a parachute that will deliver an egg safely to the ground. Good luck!

A great science fair project on solar oven design that helps kids learn about solar power and solar heating.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

Here's a math, science, and social studies activity: help your kindergartener become a "coin archaeologist" by examining how different coins look and feel.

This science fair project idea studies how talking on a cell phone affect driving?