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In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

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

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

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

This project compares the strength of one, two, and three-ply toilet paper.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

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

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

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!

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

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

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.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

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

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Kids conduct a simple birdseed experiment to figure out what kinds of birds live nearby in this fun science activity.

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

Will the shape of an ice cube impact how fast the ice melts?

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

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

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

This science fair project idea explores how far the âdanger zoneâ is from different types of caution signs.