In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

Science fair project in which you will build your own algae photobioreactor which will meet the physiological requirements of algae for maximum growth.

This science fair project idea teaches to understand and explore the concepts of crystal formation and dissolving substances.

This science fair experiment idea's objective is to understand the general concept of an acid and a base.

In this science fair project, students create their own miniature salt flats at home.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Kids learn how to make a simple electric motor in this great engineering science fair project that teaches them how current generates its own magnetic field.

This fun elementary school science fair project idea helps students in designing an amusement park using their knowledge of forces and simple machines.

Make a backbone model to explore human anatomy and life science.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

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

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

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

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?

Check out this cool and free middle school science fair project idea on how to make a solar oven.

Make a list of items that need repurposing such as e-waste, batteries and mattresses. Invent your own original repurposed design.

This science fair project idea's objective is to become familiar with items your family regularly throws in the trash.

This basketball project explores the best way to make the perfect shot every time.

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

Science fair project which teaches you how to make your own homemade glue by combing curdled milk with baking soda.

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

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

This experiment will explore if a randomly iterated algorithm will result in a pattern.

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.