We all know that the Moon has different phases, but it can be hard to figure out why. Try this activity to see how the Moon's phases really work.

The goal of this fun science experiment is to explore the limitations of sight and learn working of the human eyes.

Study structure of the lens found in the human eye and determine whether it is concave or convex. Prepare a ray diagram, formulate hypothesis.

This science fair project idea investigates how color affects temperature.

Students will investigate the illumination durations and intensities of different luminous substances of different colors of the spectrum.

This science fair project idea determines which method of hand cleansing is the most effective.

Play this flashlight game with your child to teach him about objects that are transparent, translucent, and opaque.

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Check out this fun leaf chromatography science fair project idea for middle school students and discover the hidden pigments in leaves.

In this science project idea learn about working of different types of smoke detectors and find out which one is the most effective for you.

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

Explore the effect of wind speed on the burning rate of a candle.

This science fair project idea determines what household items are good conductors of electricity.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

Which sunscreen is most effective at blocking the sun's harmful UV rays? Test the SPF of various sunblock brands in this cool science project!

Learn to solve a crime scene investigation using an important forensics tool: oblique lighting.

Recreate the fantastic phenomena of solar eclipses with your child using just a flashlight, a quarter, and her very own face!

Before digital cameras, before Polaroids, there was the original pinhole camera. Build a pinhole camera and see what true vintage photography looks like!

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

Check out this fun science fair project idea to explore the process of diffusion in a cell and learn the difference between osmosis and diffusion.

Science fair project that creates fog using bottles of hot and cold water.

This experiment investigates the relationship between the temperature of a candle and its burn rate.

The goal of this science fair project is to demonstrate the effects of oxidation by writing a message in invisible ink made from lemon juice.

Design a livable building that functions without electricity. Consider necessities, comforts and entertainment. Build a scale model of your design.

Science fair project that illustrates the properties of black holes in space.