Paul Klee was born to a musician family, and his works were greatly influenced by musical theory and tonality.  He was highly experimental, drawing caricatures as a young child, experimenting with zinc plate etchings with which his famous Inventions series was created.  He experimented with Cubism and watercolours, as well as abstract painting.  After his breakthrough with colour, Klee's fascination with colour and his foundation in music was expressed in the palates he used, with dissonant chords and colors working together, or assonant color palates used like the major chords in a scale.  Oftentimes Klee would experiment with many mediums, using different bases for canvas such as gauze, cardboard, metal foils, fabric, and newspaper.  He also used different methods such as spray paint, oil with watercolour, and more.  He was a diverse artist, often drawing upon his background as a draftsman and musician, often including symbols and musical notation in his works.  He was also very fascinated with the drawings of children, and often used a childish style of drawing.