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What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

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.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

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 handprint reindeer adds some whimsy to your Christmas decorations. Make a handprint reindeer with your child out of paper and pom poms.

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.

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

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

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!

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

Kids will love painting shapes of objects in a still life while using strong colors showing highlights and shadows.

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

Create a silhouetted Halloween candle holder with this upcycled activity!

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

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

Recycle a baby jar to make this beautiful votive with your second grader! This arts and crafts project is a fun, colorful activity and makes a great gift.

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.

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.

Use an old strawberry basket to create a decorative box for storing knickknacks, jewelry or odds and ends with this recycled craft.

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