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

Does your child always demand to know why the sky is blue, how the sun moves across the sky, or where wind comes from?

Learn about nature by making your own mini moss garden.

This science fair project will help students learn about non-vascular plants, such as mosses.

Learn all about balance and motion as your child designs a corn maze!

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Make a wish upon a tree with this craft that also helps your child learn more about Chinese culture.

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

Learn about this simple machine and make a pulley of your own to use for fun science trials.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Inspire your child to learn about an amazing animal as she creates her very own polar bear habitat.

This will encourage your child to utilize their observation skills, develop aesthetic awareness, build artistic drawing abilities and learn about the seasons.

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

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

Before your treat your child (and yourself!) to a yummy snack, help her learn a little about Sir Isaac Newton's First Law of Motion!

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

This balloon-powered car project is a great way for your kid to learn about energy and how it can be used efficiently.

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.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.