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.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

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 examines whether boys and girls differ in reflexes.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

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

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

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.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

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.

This science fair project idea investigates if fats add to the flavor of food.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

Find out which kind of bubble wrap fares best when put in impact.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

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

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

Discover whether a metal will expand under hot water.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

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

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.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Find out whether putting something on top of a plant will inhibit its growth.

Do different types of oil mix or stack? Find out in this science fair project idea!

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

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

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

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