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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.

Discover which fabrics shrink the most in the wash and why.

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 investigates how color affects temperature.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

Here's a first grade ladybug game that explores how air can move solid objects, and adds some measurement practice, too. Play, learn, and enjoy!

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

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot navigate around several obstacles.

This science fair project idea explores the egg's thin membrane.

Learn about lateral earthquake motion and its effect on high rise buildings in this simple 4th grade earth science experiment.

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

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Check out this fun and easy science fair project idea on germination of a seed and learn to identify exterior and interior parts of a bean seed.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

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

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

The goal of this project is to create an exciting topographical map out of dough.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

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

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.