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

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

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

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.

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.

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

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.

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

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

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.

First grade science often covers solids, liquids, and gases. This silly science explores serious facts about the difference between all three.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

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

Play this flashlight game with your child to teach him about objects that are transparent, translucent, and opaque.

This science fair project idea explores whether talking to a plant will help it grow.