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Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

This science fair project idea investigates the difference in reaction times between boys and girls.

In this free science fair project idea, kids will conduct an easy electrolysis of water experiment to test solutions of salt, baking soda, tap water, and more.

Determine how different measurements of the same object might yield different values. Provide as many reasons that you can think of.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

This project explores the effectiveness of various common household ingredients in cleaning tarnished and oxidized coins.

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

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

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

In this science fair project, students will learn how to calculate the formula for the thermal decomposition of potassium chlorate.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

In this experiment you simulate radioactive decay in order to gain an understanding of the basics of half-life.

Science fair project that tests the effects of diluted soap on the size of bubbles blown from the solution. Will dilution cause smaller bubbles?

Science fair project which examines the relationship between frequency of spider web vibration and spider's response time.

This science fair project explores different types of endangered frogs, and why some are endangered while others are not.

Explore the wave-particle duality of light! Learn how light can behave as both a wave and a particle in this cool physics science fair project idea for kids.

Investigate which substances are most effective at removing salt from water.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

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.

How can Hooke's law explain how springs work? Learn about how Hooke's law is at work when you exert force on a spring in this cool science project.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

Learn about the Atwood Machine and Newton's 2nd Law with a pulley and masses of different weights in this physics science project.

This science fair project idea raises awareness of a real ecological issue.

Science fair project that determines the correlation between wind direction and subsequent weather patterns.