Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

This science fair project idea explores the different properties of matter.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

Cherries usually burst with flavor, but in this science experiment they burst with osmotic pressure. This science activity will blow your curious kid's mind!

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?

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

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

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

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

This science fair project idea experiments with spinning color wheels and optical illusions.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

In this science fair project, students use the streak test to tell minerals apart from each other.

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.