We have four daughters, 9 years, 10 years, 11 years, and 12 years. They all have their own favourite Princess, we have a Snow White, Bell, Sleepling Beauty, and an Ariel.
My wife has painted each of their bedrooms in their favourite colours and has hand painted their Princesses on every bit of wall space going.
To save time and some money this is what she does,
find a colouring picture of their favourite Princess, using a scanner, enlarge the picture to poster size, print.
Purchase a large sheet of carbon paper (same size as poster!), or several small ones joined together, fix the carbon paper to the wall, fix the poster on top.
With a pencil or ball point pen, trace over the lines, use a mild amount of preasure, not to much though or you will ripe the picture.
When you have finished tracing the picture, remove the picture and the carbon paper, and there you have a large colouring picture on the wall ready for you to paint in the necessary colours.
When you have finished painting, let it dry and then outline the details with a marker pen.
The results are fantastic, infact some of our friends want their childrens rooms doing too.