What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

This simple activity is not only fun, it's also a useful way to organize children's closets — and offer kids some autonomy to boot.

What better way to nurture your child's imagination than by making a fairy house out of materials found in nature!

What's a crater, and how does it happen? Here's a kindergarten experiment with safe, nontoxic ingredients.

Try this activity with your child to explore what happens to rain (and the living things that need it) when it becomes polluted.

Kindergarten algebra is a lot different than high school. In kindergarten math, algebra means grouping like things, or noticing what doesn't belong in a set.

First graders are learning to think like scientists. What better place to start, then by raising tadpoles? This hands-on activity explores science in action!

Looking for a fun summer adventure? Learn what it was like to be a prospector during the California Gold Rush by panning for gold in a local creek.

Get your child math and science savvy with this fun outdoor classification game. Using chalk, your child will classify what she sees in the natural world.

What better way to celebrate spring than with a fabulous flower party? Pack the day with fun flower activities and treats for a truly springalicious event!

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.

Help your fifth grader trace your family's roots and interview all the living mothers to create a makeshift, 3-D family tree!

Clouds are formed when warm and cold air meet. Here's a way for kids to see it all up close!

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Want to get your bookworm interested in science? Check out this cool activity that teaches kids how to write science fiction!

Help your kindergarten science maven explore the water cycle without getting everything wet.

In this plant habitats activity, children play the role of an ecologist and take surveys of different areas to discover the best habitat for dandelions.

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

Challenge your young dinosaur lover to examine dinosaur footprints and then create their own dinosaur fossil in this hands-on activity.

It's a rare kid who doesn't like a sandbox. Next time you're out digging, build in some earth science, too.

Has your child ever played weatherman? Try this science activity that lets kids try their hands at observing and predicting the weather.

Does your child always demand to know why the sky is blue, how the sun moves across the sky, or where wind comes from?

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

Take a closer look at the soil that surrounds us, and give your child a lesson in Geology 101!

Kids are sure to be entranced by the magic of the ocean when they create their very own ocean in a bottle.

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

Who needs paint, glitter, or crayons when you have natural art supplies right outside your front door?

Many ancient cultures used the rising or setting sun to create calendars. Observe the setting sun once a week to come up with your own solar calendar!

Try this fun garden graphing project with your kindergartener this summer to give him a leg up in math and science while spending some valuable time outdoors!