I did this in my one-year-old’s bedroom just before he was born.  His mother was determined to use this theme, and with no objections (HaHa), I spent a week working on it.  Every image is airbrushed and nothing was pre-drawn before the paint was applied.  As a final touch to complete the cartoon appearance, I used a black paint marker to outline the airbrush work on all four walls.  None of these images are of my own creation, (obviously), and this was a very simple wall mural.