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

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

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

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

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

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

Here's a first grade ladybug game that explores how air can move solid objects, and adds some measurement practice, too. Play, learn, and enjoy!

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.

Here's a science experiment that gives your kids a chance to see how fire needs oxygen to burn, with a little math and writing practice thrown in.

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.

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.

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.

Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

It's easier than you think to make homemade play dough -- just a few pantry staples makes a natural version of the toy that kids have loved for generations.

Water can go from solid to liquid to gas...but how does popcorn go from kernel to snack? Invite your first grade scientist to find out.

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

Help your child explore chromatography, which is the process of separating colors or pigments, and create a neat art project in the process!

Here's a fun activity to help build thinking skills in young first grade scientists, and to encourage them to have a blast exploring the mass and volume.

How do people move pianos and heavy furniture into tall buildings? Show your kids some pulley potential with this simple household exercise!

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.

Explore solids and liquids with your young scientist by making gluep, a goopy substance that can behave like both a solid and a liquid!

This easy Halloween-themed science experiment for first-graders is perfect for chilly October afternoons or great as a Halloween party activity.

Teach your first grade scientist the difference between liquids and solids using maple syrup.