These printable Valentine's Day cards are perfect for a kid who's in love with animals and science!

Test your third grader's biology knowledge with this worksheet, which challenges him to separate invertebrates from animals with a backbone.

These clever birds harden and disguise themselves as tree branches when threatened. Learn more and do some coloring with this worksheet.

One of the most famous and easy to spot constellations is the Big Dipper! Formally known as Ursa Major, this constellation was named after a bear.

Can you figure out how the Triceratops got his name? Study this Triceratops fact sheet and see if you can guess.

Learn about how the Earth was formed in this science worksheet that covers the early years of the Earth.

Check out the unique appearance of the elephant fish in this coloring page.

Guglielmo Marconi was a man who made waves in radio and sound. Learn about his life and work, then answer a short essay question in this science worksheet.

Get to know the planets of our solar system with a stellar coloring page filled with fun facts about Uranus!

Meet the stratocumulus cloud, the kind of cloud that tend to gather in groups when a storm is on the way.

The narwhal is one unusual animal! Your child will learn about this horned sea creature through text and pictures.

What is a plateau? What's the difference between a butte and a mesa? Look at these three land forms and learn to tell them apart with this worksheet.

If we could look at the sun, what color would it be? Your child can decide with this sun coloring page, the perfect way to introduce her to astronomy!

Help your second grader understand the different types of weathering and how they can affect the earth.

Without reflective surfaces, this biker would have a much more dangerous ride. Can you find all five reflective surfaces present in this scene?

Light up your imagination with this coloring page of the fearsome anglerfish.

Hiccups interrupt us when we're talking and sometimes even get in the way of eating! Find out why we hiccup and discover some unusual ways to get rid of them.

Meet the altostratus cloud, a thin cloud that sometimes makes rain, in this earth sceince worksheet.

Can't go to the zoo? We bring the zoo to you! Check out the fulvous whistling duck, a bird with social skills and the willingness to share each other's nests.

Life on Earth is vast and varied, from high in the sky to the bottom of the sea. Learn more about what lives on Earth with this reading and quiz worksheet.

Our ecosystems need a protector; is your third grader up to the challenge? Identify harmful pollutants in a science worksheet that doubles as a coloring page.

As kids cut and pastes the pictures in the right places on this life science sheet, they learn a little about the process lettuce goes through as it grows.

How many machines can you find around the house? You may find them where you least expect it!

Does your child have a knack for astronomy? Teach him about the constellations with this great worksheet.

Quite possibly the most famous constellation, the Big Dipper is a small part of Ursa Major, the big bear constellation.

This mole has a pouch for its young, just like kangaroos. Get your child into life science learning with this fun coloring page.

Children learn to identify the tracks of a pine marten, chipmunk, mountain lion, mountain goat, and grizzly bear in this matching worksheet.

Your nature lover can learn the basics of drawing a tree with this simple step-by-step guide.

Constellations are not just named after animals, some of them are named after people! Learn about the constellation Sagittarius with this fun worksheet.

Get to know Earth's neighbor a bit more with this Mars coloring page! Your child can read a few fun facts about Mars as he colors.