A fun challenge for kids, this Earth Day crossword puzzle is a great way to review facts about the Earth and get a reminder on how to live green.

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.

The grizzly bear once roamed across most of North America; now its habitat has shrunk to the northwest. Discover more about the grizzly with this worksheet.

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

Get the facts on the beautiful elk, an American treasure and a symbol of Yellowstone National Park.

This science worksheet tells all about James Watt, the man that powered the Industrial Revolution.

Learn all about rollie pollies, a small but unique creature that always fascinates little kids. There's even a bit of rollie pollie match to boot.

In this worksheet, children practice identifying animals of North America by their tracks.

Let your kid's knowledge of leaf vocabulary climb as high as a tall, tall tree with this fun word search.

Here's a quick overview of drought and flooding to spark thoughts or conversation with your kids about water.

Ever wonder why zebras have so many stripes? Find out with this fun worksheet all about the zebra!

These 12 dinosaur names are all mixed up, and need a dinosaur expert to help unscramble the letters.

Are you afraid of spiders? Don't scream, this fun worksheet is jam-packed with interesting facts and activities, all about black widow spiders!

Can your child name 10 animals that make their home in the mountains? After completing this worksheet, he'll know all about mountain habitats!

The horned lizard has a scary exterior but a gentle personality. Your little student can learn about this North American lizard with this 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.

Ever wonder what's inside a camel's hump? Your child will become familiar with animals that live in the desert with this fun activity sheet!

Help your child read this page about the Sumatran rhinoceros, where they can color an illustration as they learn about why this animal is endangered.

Looking for a worksheet to help your kid with science? This printable will help him with his knowledge of geology.

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.