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

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

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

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

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.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

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

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

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!

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

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.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

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

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.