We, the well-to-do, do not like children scribbling or drawing on our walls (unless it is "good" art).

On the walls of Mustafabad, I saw children had scribbled all kinds of things. A lot houses had tiles on the walls of their bedrooms and living rooms. I've never seen this before. It is better than the most expensive washable paint. Children can do whatever they want and it just cleans off with a wet cloth.