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.

Discover how and which salt melts ice the quickest.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

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

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

This science fair project idea explores whether color affects a person's emotional state.

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

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Science fair project which determines whether it is numerically possible to be connected to every person on the earth within six degrees of separation.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

In this experiment you will replicate the mummification process by making a hot dog mummy.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei.

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

In this Bernoulli's Principle experiment, you'll learn how an increase in the speed of a fluid, like air, decreases pressure.

This science fair project idea determines the probability of a coin landing heads or tails.

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

This science fair project teaches students about wilting and browning of salad greens.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.