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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.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

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.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Test your friends to find out if you can replicate the placebo effect's incredible results.

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

This science fair project idea examines the reason boats are shaped and engineered.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

In this activity, students will be challenged to describe and count the ways a toy moves from one position on a grid to another.

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

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!

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Reinforce your child’s understanding of the alphabet by helping them construct all of the letters using pipe cleaners.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

How do we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

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

Get your child outside to observe the clouds, and get a fun exercise in science, writing, and arts and crafts! Here's how.

In this project children practice the scientific method while playing with puffy paint.

Using a toy race car kids create a visual model of the Doppler Effect.

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!