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The objective of this science fair project is to determine whether there are gender differences when boys and girls view optical illusions.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

This optics-based science fair project idea teaches kids about real and virtual images with a mind-bending candle illusion inspired by Pepper's Ghost.

This science fair project investigates which of two learning modes most commonly used in school, visual and auditory, is better for information retention.

The goal of this fun science experiment is to explore the limitations of sight and learn working of the human eyes.

Discover whether eating certain foods will make you smell (not only bad breath) but through skin cells.

Science fair project in which you will create your electricity by making a homemade battery using salt water, a nail, and a copper wire.

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

Science fair project which examines how stopping a tomato's ripening process using the enzyme ethylene effects the tomato plant and its reproduction cycle.

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Use this fun activity to make an optical illusion picture that helps your kindergartener explore the sense of sight, and sharpen his observation skills!

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.

This project analyzes people's emotional responses to images in painting vs similar images in photographs.

In this science fair project, students will use four different household objects to see which ones form the most or best crystals.

This project uses science and art to help students learn and teach others about Earth's endangered and extinct species.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

Science fair project that determines how your mirror image differs from your actual image and how virtual images are constructed.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Determine how wind speed affects the stability of a kite and the ease of getting it into the air.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

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

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

This science fair project idea raises awareness of a real ecological issue.

Find out whether a longer airplane will fly farther or a wider paper airplane.