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

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

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.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Plants and light seem to be good buddies, but how far does the friendship really go?

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

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

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

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

Discover whether cold or hot water from the faucet will boil faster on the stove.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

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

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

This science fair project idea investigates the difference in reaction times between boys and girls.

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

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

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.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

This science fair project idea determines which method of hand cleansing is the most effective.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

This science fair project idea demonstrates that plants give off water.

Determine if gender affects the ability to identify different smells.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.