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Set off an a science adventure as you prepare a row of bee homes for your new visitors.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

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.

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

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.

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.

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

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.

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!

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

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

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.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

In this science fair project, students make their own rain gauge to measure rainfall.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

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

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

This classic children's game demonstrates how sound travels through air vs. through a solid.

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

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

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

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

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.