I found a really good blog with decorating ideas. The result will depend on your budget and your girl's favourite colour, personality and hobbies. It may be a good idea giving colour markers/paints to the person in mind asking her to paint how her favourite colours in a piece of paper.
This way you have a better chance of getting her taste spot on. Hope it helps.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.