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

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

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

Do this experiment to help your first grader understand how salt can be removed from salt water. All it takes are a few household materials.

Make meringues with your first grader and see how states of matter can transform before your very eyes. Here's how:

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.

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

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

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

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.

Satisfy your sweet tooth with this easy summer activity! Make homemade ice cream and let your child practice his science skills.

How do we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

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!

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

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!

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.

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.

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.

Put a twist on traditional oil painting with this fun science activity that you and your first grader can do together.

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.

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

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

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

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

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

Did you ever think you could make colors disappear right before your eyes? This science experiment is just like a magic trick: now you see it, now you don't!

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 first grader explore the world of scientific measurement by "weighing" fruit with a "water scale"!

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.

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