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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.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

Construct and experiment with a periscope using reflected light rays to gather an image.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

This science fair project idea examines which type of insulation holds in the most heat.

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

This science fair project idea produces sounds by creating vibrations using different objects.

This science fair project idea provides evidence that air is everywhere and takes up space.

Explore scientific concepts with this experiment that introduces kids to the scientific method!

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

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

This science fair project idea explores the egg's thin membrane.

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.