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!

Did you know that baby turtles are born all alone on the beach? Learn about the life cycle of a turtle with this life science worksheet.

Did you know that your tongue is one of the strongest muscles in your body? Tickle your learning taste buds with this worksheet all about your tongue.

Put your kid's observational skills to the test with this word search that will help her learn some of the animals that inhabit a rainforest.

Take a trip down to the deep blue sea and learn about the life cycle of a fish! Fish go through the same stages of life as many other living things.

Our silkworm facts help your little one understand more about these special invertebrates. He'll read about their life stages and answer some questions.

Learn about pearls, which seem like normal jewelry from a factory but are actually made from the mucus of mollusks!

You have a lot in common with all the other humans on this planet. You all have noses and arms and fingernails, but what makes you different?

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

Wolves are an animal with a bit of rough past in Yellowstone National Park. Learn all about them!

Test your little nature-lover's knowledge about our feathery friends. Can she figure out which bird fits each description?

The rainforest is a vibrant, lush place teaming with life! Your little nature explorer can take an expedition to find the many hidden animals in this scene.

Your child will write about his or her favorite animal. Kids will research their favorite animals online or at the library, then write down three facts.

Think toads and frogs are the same? Think again! Check out this breakdown of the differences between the two, complete with a quiz to check your new knowledge.

Learners will get to know the bald eagle, the national bird of the United States and an inhabitant of Yellowstone National Park.

Learn about the great horned owl of Yellowstone National Park, a bird so big and mean that it has the nickname, "tiger owl."

This tree anatomy worksheet will give your little naturalist a better understanding of the parts that make up a tree.

Learn the difference between behavioral and physical adaptations with this cut-and-paste worksheet for second and third graders!

Challenge your child' memory skills with this colorful worksheet. This fun printable will help with memorization skills and spatial awareness.

Learn about the animal practice of hibernation in this quick science worksheet.

This multi-page worksheet provides an opportunity for kids to practice both their understanding of food webs and their reading comprension skills.

Open your ears for some interesting science! Your little biologist will learn the basic parts of the ear with this diagram.

Get all the Tasmanian devil facts on this worksheet, from what they eat to how they got their name.

This worksheet featuring food and natural resources touches on the subject of food chains.

How much does your child know about the animal kingdom? Help her discover interesting facts with this animal crossword.

This colorful diagram is a handy reference guide for kids learning basic body systems.

All living things have a life cycle. Learn about the different stages that a bird goes through from birth to adulthood!

Crossword puzzles are a great way to make life science learning fun. This one's all about natural selection, and it's sure to give your child a fun challenge.

Track down some of the most famous animals of the Amazon -- and other places -- with this rainforest coloring page that doubles as a life-science lesson.

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