Design and build a scale model representing living tree architecture. Then build a full-size version using one or more lives trees, and test your creation.

This science fair project idea determines the probability of a coin landing heads or tails.

Calculate the mass of the Earth using the sidereal and calendar period of the Moon and Newton's Law of Universal Gravitation in this physics science project!

Investigate the different ways in which objects and organisms can be classified, create your own. then have volunteers classify using their own systems.

This science fair project idea studies the differences in gender perception between people.

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!

This fascinating science fair project explores eye color genotypes.

Kids use applied math to build and test a parabolic mirror solar hot dog cooker in this cool engineering science fair project idea for middle school.

Science fair project that helps visualize how the human brain functions by constructing a model of a brain.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Find out whether matte or shiny nail polish lasts longer.

Here's a simple science activity that will help your child better understand how wells bring us water.

Science fair project that determines whether windmills can be designed so that birds will not feed on them. Will they discriminate between different patterns?

Looking for a project on fossils? Check out this fun science fair project idea to understand the process of coal formation and fossils part in that formation.

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.

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!

Examine whether males or females are more likely to have a higher center of gravity.

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

Find out whether pacing in long-distance running actually acquires for drastic changes in finishing times versus running super-fast at the start.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

Make a list of items that need repurposing such as e-waste, batteries and mattresses. Invent your own original repurposed design.

This project examines whether more expensive golf balls translate into better results on the golf course.

This project compares test subjects' responses to whining and other "attachment" and attention-getting sounds to determine which sounds are most distracting.

This experiment evaluates how a diet that is rich in "mood-enhancing" foods affects the way people feel over several weeks.

Science fair project which determines whether people are more likely to follow rules if they are easy to understand.

This science fair project aims to examine the nature of pi and analyze other properties and values related to circles, such as radius, diameter

Research basic components of vacuum cleaners, consult vacuum cleaner manufacturers for advice. Design vacuum with attachments that change automatically.

This science fair project investigates why the number of visible stars changes from place to place.

Check out this cool science fair project idea to explore the relation between onions and eyes and how to prevent eyes from tearing while cutting an onion.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.