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

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.

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.

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!

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

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.

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.

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

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

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

This homemade parachute toy is incredibly easy to build. Plus, it gives kids an excuse to investigate and experiment...the backbone of kindergarten science.

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

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

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.

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

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.

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

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

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.

Here's a science activity that lets a first grader use an empty dish detergent bottle to create his own fountain as he explores air pressure.

Introduce your child to science with something they see everyday--their shadow!

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!

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

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.

Teach your child about using pumps to move water in this simple and educational preschool science activity!

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

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!

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.