Rainbows look like swipes of brightly colored paint hanging in the sky. Have you ever wondered how they got there?

Space enthusiasts will love learning about Freedom 7, the first manned American space mission.

Use these STEM design challenges to foster creativity and critical thinking skills in young learners while introducing them to the engineering process.

How much do you know about our home planet? Boost your Earth knowledge with this science printable.

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

If your kid loves the ocean, he may enjoy learning tons of trivia about our fishy friends in the sea. Brush up on your fish facts with this fun page!

A useful overview of terrestrial biomes, including a climate key.

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

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

Flex your mind muscles with a body science worksheet! Your child will learn the fundamentals of what makes up our muscles.

Did you know jaguars are great swimmers? Kids will learn all about rainforest animals with this fun activity page, including a word search and coloring!

Do you know why Mars is called the Red Planet? Find out that and more on this planet printable.

Kids will learn about fossils in this worksheet. Help your child learn about the scientific method by getting him to examine a fossilized dinosaur skeleton.

In this North American animal tracks worksheet, students hone their observation skills by matching tracks to animals.

Encourage your little environmentalist to learn about composting! Children will boost their reading skills as they learn what compost is and how it helps the environment.

Did you know that each tree tells a story? In this worksheet, children peer inside a tree to learn about the layers in its trunk.

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.

Without rain, we wouldn't have any puddles to splash and stomp in. Does your third grader know why and how rain falls from the clouds?

Did you know that there are forests in the temperate ocean ecosystem? Learn all about the temperate ocean with this fun ecosystems sheet!

Kids need lots of things to grow up healthy and strong, and plants do, too! Can your child think of things a plant needs to grow?

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.

Pull the lever on learning! Get to know one of the six simple machines with this worksheet about the lever.

Did you know that ocean water is salty, but river water is not? Find out how fresh and salt water mix together in this water cycle worksheet.

Did you know that invertebrates don't have backbones? Find out some different types of invertebrates with the clues in this crossword puzzle.

Learn about the many different biomes the Earth is home to in this life science worksheet, which holds the answers to some simple life science questions.

Worm your way through this soil maze, which doubles as a fun way to review the names of the different soil layers.

Use the clues in this crossword puzzle to fill in the blanks with different types of snake names. Learn interesting facts about snakes as you go!

Let your coloring skills blossom with this flower anatomy worksheet. Make your own flower, color and put your vocabulary skills to the test!

Let your curious kid learn a little bit about how fireworks work in this summer science sheet.

Jaguars eat deer? Wow. Alligators, too? Are you kidding? What don't they eat? There's way more to learn about these intriguing eaters in this cool worksheet.