Inside the lines or on the edges?
I remember that I once liked colouring books or, at least, I remember enjoying colouring with the kids I was babysitting. There was something satisfying in choosing colours and playing with texture and pressure, often while having a conversation. Colouring inside the lines is often scorned, but the lines make it easy to relax into colour. My children had a different kind of childhood, and I remember only a few colouring books, mostly used as samples of how to draw superheros. My children learned to sketch early, and I encouraged them to take sketch books to picnics and parks and art galleries. They delighted in making the lines and sometimes even in filling them with colour. If someone else gives you the edges, you will probably bump into them. You will probably find that your colours move over the lines here and there. You will probably feel constrained. The problem may not be lines. It may be lines that don't provide you with the shape you need. Because when you make your o...