Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

Are your taste buds up for the challenge? Put tongues to the test with this science fair project that examines who enjoys sour flavors more, adults or kids?

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

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

Test whether plants can grow without sunlight and water.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

This science fair project idea experiments with spinning color wheels and optical illusions.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

Construct and experiment with a periscope using reflected light rays to gather an image.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.