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.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

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

What's a crater, and how does it happen? Here's a kindergarten experiment with safe, nontoxic ingredients.

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

Kids are sure to be entranced by the magic of the ocean when they create their very own ocean in a bottle.

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

This science fair project idea's objective is to become familiar with items your family regularly throws in the trash.

Enjoy those warm spring and summer nights with your child while teaching some basic astronomy at the same time.

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!