These faces are drawn after photos from a book about knitting. It was called "Ik hou van breien" (I love knitting, in Dutch). It was full of knitting patterns and photos of people wearing the knitted clothing. I did not find a useful pattern to knit though. Most of the patterns were too complicated for my current knitting skills. Guess I stick to knitting small pieces of cloth for my blanket again.
At the moment I really love this song. I discovered it today while looking for good music to paint with.