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

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

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.

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.

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.

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

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

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

This science fair project idea investigates if webbed feet help a duck (and others) swim.

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 science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

This science fair project idea compares biodiversity between drops of water.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

This science fair project idea examines the reason boats are shaped and engineered.

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.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

In this project children practice the scientific method while playing with puffy paint.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.