Read about one of Yellowstone National Park's coolest animals, the big horn sheep.

Launch into learning with this worksheet on Gemini 4, one of the original missions in the early days of the U.S.'s space program.

Through a simple matching activity, kids learn how their actions can have a direct effect on the environment.

Discover the symbiotic relationship that helps this angler fish find his next meal!

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

This is not your average coloring page. Using only the three primary colors, mix your paints together to form as many colors as possible.

Colorado's state bird is the Lark Bunting, and you can learn all about it with this coloring page.

Young inventors will have a blast with this worksheet on compound machines! Use three of the six machines together to make work easier.

Color, cut out, and play with these fun animal finger puppets as your nature lover learns more about prairie dogs, bison, and other animals of the grasslands.

Learn about Red River Hogs in this series of animals facts sheets and coloring pages in one.

Let your 1st grader become a mad scientist in this fun science board game, and encourage her to become a lover of the interesting subject.

Bird-watchers will love this worksheet, featuring just a sample of the many song birds flying around Yellowstone National Park.

Alfred Nobel, though he held over 300 patents in his lifetime, is most famous for inventing dynamite.

Practice your detective skills with this fun worksheet! Have your child go around the house and see how many things from the list they can find.

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

Did you know snowflakes are so unique, there are no two alike? Teach your child about how snow forms with this worksheet.

Teach your curious first grader the names of all his different teeth with this informative worksheet!

Your future oceanographer will enjoy coloring in the multi-eyed octopus in this coloring page in addition to adding color to the cute angel fish beside him!

Learn about Yellowstone National Park's peregrine falcons, which survived heavy pesticide use in the 1960s.

Searching for help with you kid's geography skills? This printable worksheet will teach them the continent of South America.

Magnets are fun to play with, but how do they actually work? Have your child circle the objects he thinks the magnet will attract.

Learn about the California tiger salamander, which uses its toxic, bad smell as a defense.

Take a quick lesson in the otters that inhabit Yellowstone National Park and take an even quicker quiz.

Explore the circle of life with this informative coloring sheet! Help your student color and learn the names of each stage of a rhino beetleâs life.

Get out there and see what nature has to offer! This personal goal-setting worksheet will help your first grader get a head start on the summer.

If you're fascinated by bugs, check out this coloring page featuring the insect order Odonata, which consists of damselfies and dragonflies.

Explore this diagram of the water hyacinth with your little one. She'll be learning the parts of a flower as she colors in this delighful picture.

Practice telling the difference between the four seasons with this fun coloring activity.

The Ohio state bird, the Cardinal, is famous for their bright red color. Can you give this one some color?