This week, we studied this painting featuring Tahitian women and a vibrant Tahitian landscape ny the French Impressionist Paul Gauguin. It have us the opportunity to address two concepts: first, the idea of landscape and foreground and background in a painting, and second, primary and secondary colors.
It was an exercise in observation to notice the details in the foreground and background. Sky, mountains, hills, rocks, grassy meadow, and pond or river, this painting had a variety of landscape details to notice.
After observing the landscape, I gave the children only primary colors on their paper plate palettes.
After drawing their landscape outlines with a pencil, they got to work, creating bright colors from the red, yellow, and blue they were given.
Unfortunately, I don’t have pictures of the final works of art, because my camera is missing. 
ETA: Found the camera! Here are our finished works of art:
Nicholas just sort of went to town. He had fun mixing colors though.
Katie Grace made on ocean scene, with waves, fish, sunshine, an island, and a volcano!
And finally, Michael made two volcanos with large palm trees. I think.
I love these photos. Excellent.
I am learning so much from your homeschooling art classes!