It is demoralizing to think that many people consider cartoon illustrations to be solely for children however, that is not the case. If you establish this notion then it will bring you great difficulty in the field of illustration design. If you intend to become an illustrator person cartoon illustrations are the best start for entering into the field of illustration design. I personally found cartoon illustrations the most difficult to design but with time and practice, I was able to hone my skills in this domain of art. Does anyone here work as an illustrator?