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Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

Use pepper and soap to discover some fun facts about the properties of water.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

In this science fair project, students use the streak test to tell minerals apart from each other.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Handedness and footedness refer to whether people prefer to use their left or right hand and foot. In this experiment, test hand and foot dominance.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

This science fair project will help students learn about non-vascular plants, such as mosses.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Determine if gender affects the ability to identify different smells.

In this science fair project you will make a model of a cell membrane using very simple material.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

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

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

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

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

In this project students experiment with making music using only glasses of water.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Using a toy race car kids create a visual model of the Doppler Effect.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!