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

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

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

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

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

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

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.

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

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

Delight your budding scientist with this cool physics magic trick and teach her some basic physics concepts while you're at it!

This science exploration lets your first grader see how eggs can provide a perfect environment for a living, growing creature.

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

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

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.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

Introduce your child to the amazing, almost magical phenomenon of static electricity!

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

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

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.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

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

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

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

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.

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

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!