Meet the master of compound machines: Rube Goldberg! His wacky contraptions put a whole new spin on the use of simple machines.

First graders can read the information about Mercury then label each layer of the planet using what they've learned.

All living things need a few basic things to survive. Can your little scientist name the things that a plant needs?

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.

What does the Earth look like? Find out all about the nooks and crannies that cover the planet with this landforms worksheet.

Children learn why the light from the sun seems white to us, why we see objects in color, and why the sky is blue in this beautiful and fascinating worksheet.

Learn all about rivers--how they were formed, what they're made of, and what they do for us and the planet--in this reading and science worksheet.

Find out how colors work with an intro to the color spectrum. Kids will investigate the seven colors of the rainbow and do a color wheel experiment.

Children work on pattern-spotting and observation skills as they determine which of these six type of creatures is a bird.

What delicious treats do we receive from trees? Your child can draw their favorite tree-provided snacks in this cute drawing worksheet.

Turn a patchy day into a fun science adventure with this cloud gazing worksheet! Draw the clouds you spot, and then identify which type they are.

Here's a stormy science adventure that will blow your socks off! Learn about tracking hurricanes with this map of coordinates.

Learn about a common hawk native to North America, the Red-Tailed Hawk! Your child will love coloring this page as he reads some fun facts about this species.

Did you know opossums are marsupials, which means they have a pouch! This fun worksheet is jam-packed with fun facts about the opossum!

The Alaska state bird is the Willow Ptarmigan, also known as the Willow Grouse. First graders can learn fun facts and add color to the picture of the bird!

Did you know butterflies have no teeth? How do you think they eat? Check out this science worksheet to learn all about it.

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

Animals need to adapt to survive! Teach your child how some animals can blend with their surroundings using camouflage.