Paul Klee is hard to classify. His works are instantly recognizable and belong in a category of their own.
They are abstract, expressionist, Bauhaus, cubist, surrealist but when trying to describe his work one ends up grasping for something more. His work does not fit into any box of art history but rather it seems to be a natural extension of himself.
When stumbling upon his works in museums, the word childlike is sure to appear on many lips. This quality is quite whimsical, romantic and even a bit humorous. It makes it hard to not instantly love Klee.
In his early years, Klee struggled with art-school. Color was the hurdle. He seemed to lack a natural sense of using color, but he continued with art. Klee was also a gifted musician but felt that he had something to add to abstract art not music. It was this element of avant garde in art that excited him, he did not sense this in music.
It was when Klee met famed artist, Kandinsky that he began to open up to the possibilities with color. This turning point reach it's clarity when he quipped “Color has taken possession of me; no longer do I have to chase after it, I know that it has hold of me forever. That is the significance of this blessed moment. Color and I are one. I am a painter.”
While other artists used 

