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

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

Your child grows a green thumb and flowers with this seed planting activity that also celebrates the 100th day of school!

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

Does dough rise faster with unbleached or bleached flour? Investigate in this science fair project idea.

This science fair project idea explores substances that cause a bubble to last longer.

Here's a fun activity that will have your child researching, collecting, and charting plant specimens from the neighborhood.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

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?

This science fair project idea investigates if fats add to the flavor of food.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

This science fair project idea determines if the color of light affects the growth of plants.

In this fun experiment, we'll find out how color affects heat absorption!

There are hundreds of properties in rocks which you can describe, so get your geology goggles on and get ready to rock your child's science skills.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

Here's a science and nature activity to help your kindergartener get outdoors and learn about the structure of leaves.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

This science fair project idea investigates the difference in reaction times between boys and girls.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Plant a mini herb garden and teach your child about science and nature.