When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

Blanket forts are a kid classic! Let your child create a âfortress of solitudeâ on his own for reading, telling scary stories or for cozy cocooning.

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

This is a fun way to introduce kids to the concept of volume, and give them a quick hands-on activity to boot.

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

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

What's cooler than an explosion? Not much! This simple science experiment lets kids build their own pop rocket. So put on your safety goggles and let her rip.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

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.

This quick and simple preschool mirror activity will introduce your child to the science of reflection and light with a flashlight experiment and picture game.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

Your second grader will love this simple soda bottle race car activity. Make a ramp and customize your car for an entertaining way to learn scientific concepts.

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Engineers in training can get started with this simple wheel-and-axle construction activity.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Teach your kids about entropy with this fun, easy exercise, and teach your money to dance while you're at it!

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

This science fair project idea produces sounds by creating vibrations using different objects.

This classic children's game demonstrates how sound travels through air vs. through a solid.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.