Some people may not look at art as really being a subject. Some may not realize there is more to art than just paint, glue, clay, etc.  I know that my children love art not only because it is fun but also because it allows them absolute freedom to explore their creativeness and learn about history in a different way.
Learning about different artist and their style, this is what makes art so much more then just something interesting to look at.

One of my personal favorites is Leonardo da Vinci; his Mona Lisa, Last Supper ~>need I say more!

Art to me is one of the best subjects to learn about!