Even colors have best friends. In the world of color, these best friend pairings are called complimentary colors.

Here's a thorough, easy-to-understand breakdown of the color wheel that includes primary, secondary and tertiary colors.

Can you explain why your blue shirt is blue? This worksheet is full of facts about light and how it reacts with objects to give us the perception of color.

Did you know wolves are the largest members of the dog family? This fun worksheet is jam-packed with fun facts about the wolf!

Need a colorful way to impress your friends and family? This worksheet has got you covered!

Increase your child's vocabulary and knowledge of the scientific world around him with a single sheet!

Without light sources, we wouldn't have any light. Can you imagine a world without any light sources?

These are the largest tortoises in the world, yet they are only two inches long when they hatch! That's one of the facts you can learn from this worksheet.

Did you know chameleons can sleep upside-down? Learn more about chameleons with this fun worksheet, jam-packed with fun facts and activities!

Nature is all around us! But how much does your child know about our natural world? Test her knowledge with some nature fun-facts trivia.

Dragonflies are some of the oddest looking insects in the world, so it's appropriate that they have so many unique characteristics. Read all about them!

Ever wonder what makes the leaves change colors in the fall? Find out with this fascinating life science worksheet.

How much do you know about our solar system's planets? Kids learn facts about Neptune in an out-of-this-world worksheet.

Who knew that the machines of the world are all made of just 6 simple machines working together? Introduce your child to simple machines with this worksheet.

Learn about spider tortoises, one of the world's tiniest tortoise species, with this handy worksheet. Can't go to the zoo? We bring the zoo to you!

Grandma and grandpa didn't always have gray hair. Find out about what gives our hair color and what makes our hair lose that color as we get older.

There aren't many blue animals out there, but here's one that will be fun to color: the blue dart frog. Its bright color warns predators that it is poisonous.

Discover some fun facts about the sun — and bring it to life with color — with this astronomy worksheet!

Color in the gold and red colors of this common grasshopper species and learn about insect orders with your child!

Learn a little bit about green tree frogs (like that they sleep on the underside of leaves!) and then color in this scene of them at the zoo.

Have you ever heard of a Caracara? This fun page is full of facts about this unique bird, including a word scramble and a color by number activity.

Children learn about the food cycle in a rain forest as they color in a scene of snakes, butterflies, leopards, and other forest-dwelling creatures.

Children learn why the light from the sun seems white to us, why we see objects in color, and why the sky is blue in this beautiful and fascinating worksheet.

If your kid gets excited about snakes, you need this cool worksheet. Learn a bit about carpet pythons, such as what colors they may be, and then color the picture.

How much do you know about our national bird? Enjoy an info page about the bald eagle, with a mini crossword, some fun facts and a picture to color.

Do you know what's the largest parrot in Africa? It's the African grey parrot! Learn about this blabbering bird and give the image some color.

If you're looking to color a chimpanzee, you won't find a coloring page better than this one. Learn some facts about these animals while you're at it.

For kids learning geography or earth science, this is the perfect review sheet for drilling students on common geography terms and phrases.

Confused about continents? Get better acquainted with all the continents on earth with this word scramble.

Not your typical crossword, this puzzle will have your child learning to recognize the shapes of the continents. Great for map skills and vocabulary!