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.

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 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.

This science fair project idea researches the effects of acid rain on plant growth.

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.

This science fair project idea observes products available in the school cafeteria and waste produced by these products.

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

The project determines the forces that cause paper airplanes to fly and determine which type of paper airplane flies the farthest.

This science fair project idea creates cool new colorful fabric pattern designs and experiments with the mixing of colors.

This science fair project idea researches the definition of ‘biodegradable’ and explores this in a real-life setting.

The project investigates how water and movement affects erosion.

In this investigation, three different juices are tested to determine which juice contains the greatest amount of vitamin C.

In this project, sunlight is blocked from a leaf in order to see the affect that sunlight has on leaves.

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

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

This project tests the hypothesis that dark colors absorb more heat than light colors.

In this experiment, the weight of aluminum cans will be compared.