I love this idea. I would do it, get removable wall paper. - "A neighbour of mine has one wall in their house papered like this. Every time a new guest comes in, they are asked to colour-in a character and initial it.
Vinilos Decorativos Para Puertas - Ploteos Impresos Calidad
Textured, fancy walls are so in right now—and watercolor walls are just continuing that trend. Check out these pretty rooms that style the watercolor wall mural really well, for inspiration on how to do it in your home.