Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

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

Teach children how to upcycle dried-out markers with this homemade paint-making activity!

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

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?

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

Young scientists develop a hypothesis, conduct an experiment, and then revise their hypothesis to find out which common household liquids dissolve candy corn.

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

Using water, corn syrup, and sequins, your child can create a unique art project while exploring what happens when different liquids are mixed together!

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

Looking for hot weather fun? Cool the kids down with a homemade slip and slide! You can create your own water park atmosphere for just a few bucks.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

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!

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

Do different types of oil mix or stack? Find out in this science fair project idea!

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 children practice the scientific method while playing with puffy paint.

Construct a card castle fit for a king! Treat your royal "face" cards (the kings, queens, and jacks) to the cool castle they deserve.

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

In this fun science project your child will get practice following directions and getting messy as they learn all about slime!

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

Help your child experiment with the combination of acid and baking soda by making these homemade bath bombs!

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

Take a page from Art Nouveau master Gustav Klimt and compose a shining collage.