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.

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.

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

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:

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!

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.

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

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.

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

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.

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

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.

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

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

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.

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

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.

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.

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

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

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

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

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.