Is the birthday paradox really a paradox, or just an intriguing problem that defies intuition? Find out with this birthday paradox science fair project.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

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

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

This science fair project idea investigates how color affects temperature.

Science fair project that compares the relative carbon dioxide concentrations of various gases, including different types of vehicle emissions.

This science fair project compares the allelopathic chemical produced by the Black Walnut tree to a commercial herbicide in stopping the growth of a shrub.

Test the idea that people who wear glasses tend to be more educated. True or false?

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

In this fun science fair project idea learn the difference between additive and subtractive color and why they are handled differently.

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.

Demonstrate and explain holographic technology. Determine if a holographic image of a magnifier still magnifies the object beneath it. Explain the effect.

Get a cool science project idea on a photovoltaic cell and explore the various factors that affect the energy output of the photovoltaic cell.

This project examines whether humans can intuitively grasp numeric values greater than three.

Science fair project that models the subterranean movement of water, using Darcy's Law. How can this information be used in hazardous material spills?

What is the coldest temperature possible? In this cool experiment, you'll calculate absolute zero by extrapolating data on the temperature and volume of gas.

Kids make an electromagnet in this electromagnetic induction experiment to learn about induction, current, and the right-hand rule.

This project explores ways to prevent static electrical shocks.

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.

This project explores differences in people's reactions to images in color and images in black and white.

This science fair project determines whether the types of plants growing in a Pacific Northwest rain forest environment are influenced by the soil acidity.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

Test ability to distinguish between natural and artificial aromatherapy oils. Select fragrance, natural and synthetic sample. Volunteers state preference.

This middle school project examines the strength of horizontal versus vertical pointing eggshells.

This experiment investigates whether left-handed test subjects have better memories than right-handed participants.

Check out this fun high school science fair project idea to identify features of a mushroom and learn how do humans use fungi to their benefit?

Compare air temperature with the infrared temperature from a reflecting surface at different times of the day, in shade and in sunlight.

This science fair project idea investigates the hardness property of minerals.

This science fair project idea explores the fastest average speed a human can talk.