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

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

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

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

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

Here's a fun science experiment that's refreshingly tasty too! Turn regular water into a tasty treat perfect for consuming on a hot day.

This science experiment has students test whether a snail moves faster on concrete or dirt.

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.

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.

Your kid will be captivated as she watches liquids change color before her very eyes during this fun science project that introduces some chemistry basics.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Use pepper and soap to discover some fun facts about the properties of water.

Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

Help your kindergarten science maven explore the water cycle without getting everything wet.

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

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

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

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

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

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

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

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

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

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?