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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.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

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

How well can people recall what they have observed. Test your knowledge in this fun experiment.

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.

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

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.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

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

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Have your child kick off their summer vacation by making a miniature water slide!

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

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

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Take a dive into the candy jar with this yummy science experiment.

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

In this science fair project you will make a model of a cell membrane using very simple material.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.