This experiment requires only lemon juice, salt, sugar and grapefruit. Your budding scientist can get a great introduction to science by testing her own tongue!

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.

Introduce your student to an endangered species, Przewalski's horse, with this information sheet. They can color the illustration as they read.

Have your little chemist think about the properties, or characteristics, of metals. What makes them different than non-metals?

Read the definitions of soil, sand and dirt then write where you can find each type below the pictures. Nurture your budding geologist!

All of these products are made from plants, or they can be! Practice using a Venn diagram, researching and classifying items with your kids.

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.

Learn facts about Mars, the great red planet in the night sky. There is more find out about space by answering the question at the bottom of the worksheet.

Fly high with The Wright Brothers, two siblings who soared to the forefront of history with their design for the first modern airplane.

Learn more about what lives--and what thrives--in marshes with this fill-in-the-blank worksheet on marsh ecosystems.

Why did the fox cross the road? To look for the chicken! This fun worksheet is jam-packed with fun facts about foxes!

Quiz your kid on the names of bones in his spine with this colorful worksheet.

This is the story of our solar system. Learn about the life of Nicolaus Copurnicas and his great discovery. Learn more by answering the question at the bottom.

Help your child learn about the nervous system and the digestive system with this fun worksheet, which will challenge his knowledge of physiology.

Sink or float? Your kid may be surprised to learn that the density of coke and diet coke aren't the same!

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

Here's a great way to teach your kids more about our solar system. This worksheet focuses on the dwarf planet, Pluto.

Can you and your child come up with a few ways to conserve water in your home? This printable starts you off with five ways to conserve water.

The olm is a blind salamander that lives in Europe. Kids will learn how pictures help illustrate concepts with this life science worksheet.

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

Let your child explore the vocabulary associated with Earth's landforms with this colorful word search.

Have you ever looked into the night sky and wondered where all those millions and million of stars come from? Find out here with a mini astronomy lesson!

Here's a creature that can be a heard a mile away: a thick-billed parrot. Learn more about these birds that are the only parrots native to the USA.