The "Arthur and the Invisibles" movies is to me a wonderful story well worth to be illustrated. This is the first in a series of 5 images inspired from the movies. Progress below.
I usually draw a quick rough sketch digitally first, and then go to pencil on paper. Thereafter I start to do layers by layers of watercolor washes until I have the desired result. I then go back and touch up the colors and make it cleaner in Photoshop.