These Valentine's Day cards will be the oddest and most unique cards your sweetie ever got!

What has two legs and carries its baby in a pouch? Fill in this crossword puzzle and learn some fun facts about two-legged creatures!

Help your child practice her spelling and vocabulary with this fun worksheet! Discuss with your child what it means to be cold-blooded.

Have you ever wondered why giraffes have long necks or why lions have sharp teeth? Find the answers in this third- and fourth-grade worksheet about adaptations!

Discover the animals and plants of the past in this fossil-focused worksheet!

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

Expand your sea creature vocabulary with this Life in the Reef worksheet!

This cute worksheet prompts your first grader to find out what characteristics are shared by amphibians, and then circle the animals that fit that category.

Does your first grader want to know more about mammals? This worksheet gives her a chance to do some research to decide which animals fit into that category.

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.

Help your child learn about facts and opinions. Kids will read statements about animals before determining whether each statement is a fact or opinion.

Ecosystems are an important part of fourth grade science. This fun printable will help your child with her knowledge of plants and animals.

Which of these animals are reptiles: turtle, cobra, or jellyfish? Your first grader will ponder this question and more, when it comes to this cute worksheet.

Which of these animals does not belong? Explore the plants and animals of the desert, and choose which ones are in their right habitat.

Which of these animals do not belong? Explore the plants and animals of the rainforest, and choose which ones are in their right habitat.

Expose your 1st grader to the animals of Australia in a fun way: coloring! Start with one of the cutest, most beloved animals Down Under, the koala.

Both of these animals have big ears! Your child will look at the pictures of unusual animals in this worksheet and try to learn some new things about them.

To complete this worksheet your first grader will need to match the different animals with their homes.

Learn about the plants and animals that make deciduous forests their home, then complete the crossword puzzle.

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

Read about Yellowstone's red foxes, some of the most cunning and smart animals around.

How do nonliving things help plants and animals stay alive? Find out in this first-grade worksheet!

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

Learn all about the ooey-gooey areas of land called wetlands that provide a home for certain kinds of plants and animals.

Fact: This worksheet is about unusual animals from all over the world. Opinion: This is the best fact and opinion worksheet ever!

Encourage your child to take a nature walk, using the prompts on this worksheet to write and draw their observations of plants, animals, sounds, and more.

The Australian outback is full of unusual and odd-looking animals. Check out the echidna, a spiny creature with no teeth and a long, sticky tongue.

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

When it comes to odd-looking animals, Australian goanna lizards probably take the cake. Kids will love coloring in this odd creature.