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

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.

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

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.

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

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.

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:

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 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.

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

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

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.

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

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.

Introduce your child to the wonders of colorful chemistry with this simple food coloring project.

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

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.

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

Help your kindergarten scientist discover relative size, density, and buoyancy with this fun, pumpkin science project!

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

Help your kindergarten scientist understand the concept of surface tension with this simple science experiment.

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

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.

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

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

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

This activity is a fun way to "go fishing" with your preschooler, while learning about the concepts of freezing and melting.

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.