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.

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

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

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

This project compares the strength of one, two, and three-ply toilet paper.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

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

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

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.

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!

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

In this activity, your child will be challenged to make a tower using paper cups.

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

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

In this activity your child will create their very own marble maze!

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

Test your friends to find out if you can replicate the placebo effect's incredible results.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

In this project students experiment with making music using only glasses of water.