Demonstrate how to tell the age of an egg without having to crack it open.

In this science fair project, we'll explore how blocking the sun's light can stop those can stop photosensitive paper from changing color.

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

The actual factors affecting friction may surprise you! Learn about the coefficient of friction and put some trigonometry into practice in this science project.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

This science fair project idea determines if the temperature of rubber effects how high it bounces.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Determine how good we are at direct and indirect observation.

Demonstrate Newton's laws of motion by examining the relationship between mass, force, and acceleration during free-fall.

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

Demonstrate the relationship between mass, volume and density. Measure displaced water, and weigh object to calculate mass and density.

This science fair project idea deals with the qualities of shade on a sunny day.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

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 shows how a vibrating object transfers energy to whatever it touches.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

In this science fair project on the relationship between distance and time, kids explore the behavior of gravitational acceleration through direct observation.

Science fair project that determines whether mass and weight are the same or different.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Demonstrate how we are able to locate sounds, echolocation. Have a blindfolded subject locate you by the sound of your clapping.

This science fair project idea explores whether a person's ability to see under very dim lighting conditions diminishes with age.

This science fair project idea explores if male or female humans are more likely to exhibit some form of color blindness.

This simple project makes young children aware of their sense of smell and its capacity for providing them with information about their world.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

This experiment will explore whether fractals really repeat themselves infinitely.