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Construct batteries that make electricity from fruits with this fun science fair project.

Fruit Battery

Wind is an important source of renewable, green energy. The purpose of this science fair project is to build and operate a windmill generator.

The Answer is Blowing in the Wind

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

Gender Probability: Male and Female Chromosomes

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Floating Paper Clip

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

How to Separate Salt from Water

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

How to Make a Lemon Battery

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

Counting Tree Rings

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.

How Do Icicles Form?

Dinosaurs were huge creatures that left behind huge footprints that lasted for millions of years.  In this science fair project, kids learn how dinosaur tracks were left behind!

Dinosaur Tracks: How Are Fossilized Imprints Formed?

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

Determine the Effect of Gray Water on Plant Growth

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!

Star Clock

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

Mineral Streak

This project examines whether playing music during class helps students learn or if it distracts students from learning.

Does Music Help or Distract from Classroom Learning?

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

Inverse Square Law: How Does Distance Affect the Spreading of Light?

What heats up faster&acirc;water or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

Specific Heat of Water vs. Specific Heat of Sand

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old &ldquo;why&rdquo; questions. As you walk with your child, you can encourage them to ask questions.

Inspire Simple STEAM Exploration

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

How A Kazoo Makes Sounds

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Compost Sorting

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.

Rust Chemistry: How Does Rust Form?

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

Tensile Strength Test

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Growing Bacteria

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

Surface Features of the Moon Model

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

Cleansing Power: How Does Dishwashing Liquid Work?

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.

Digging in the Dark

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

What Is a Compound Microscope?

In this cool catalase and hydrogen peroxide experiment, kids put a potato in a jar of hydrogen peroxide to see how catalase acts as an enzyme.

Catalase and Hydrogen Peroxide Experiment

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Hero's Engine: Example of Newton's Third Law

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

Factors Affecting Solubility

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

Growing in the Dark: Plants and Light

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

Ping Pong Ball Anemometer

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