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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!

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.

Your 1st grade scientist will improve her observation skills as she's encouraged to eat healthy by comparing the dry and fresh fruit in this experiment.

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

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 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.

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.

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

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

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!

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!

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.

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

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

This is a fun way to introduce kids to the concept of volume, and give them a quick hands-on activity to boot.

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.

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

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!

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.

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

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.

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!

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.

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

Bring the magic and mystery of the night sky to the light of day with this fun constellation art project!