When I run out of pages in the children’s colouring book I’m using, I may create my own line drawings to colour. But what to draw? I’m thinking of choosing topical issues. The Guardian newspaper has a section where they publish photographs every day relating to current events. They recently published some winning photographs from a photography contest, and I traced one of these on my computer, using an app called  Sketchbook (I then processed the resulting line drawing in Adobe Illustrator) which I then filled it in with wax crayons, just to see how that would work. It worked well, so I might go with that.