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

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

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

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

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

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

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.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

The goal of this science fair project is to demonstrate different ways to generate static electricity and record its effects.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

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

This basketball project explores the best way to make the perfect shot every time.

This science project allows students to study the psychology of happiness.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

Dinosaurs were huge creatures that left behind huge footprints that lasted for millions of years. In this science fair project, kids learn how dinosaur tracks were left behind!

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

Can you fool your eyes and your brain with an optical illusion? The purpose of this science fair project is to demonstrate various kinds of optical illusions.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

This science fair project idea produces sounds by creating vibrations using different objects.

Learn about the power of exponents. The objective of this science fair project is to explore and understand how exponents are used.