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

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.

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

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.

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.

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

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

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.

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.

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.

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

In this science project, baking powder and vinegar are used to simulate the action of a fire extinguisher.

The project investigates which soft drink is worse for your teeth by observing the affect of soft drink on limestone.

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.

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

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