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.

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.

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

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

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 experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

The objective of this science project is to determine the length of time for different seeds to germinate.

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.

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

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

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.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

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!

Camouflage is one of the most important animal adaptations in the African savanna biome. Kids create their own camouflage with this fun science fair project.

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

Learn whether writing things down really makes things easier to remember.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.