I looked online for 50's clothes that are for young girls and I have found few stores selling them. Actually, young girls nowadays are so updated when it comes to fashion so you won't find it difficult looking for their clothes. For young girls, there are a lot of clothes that are made the same design as what you can see in the first image below (teens').
At Target also, you can pick few girls' clothing that’s of 50's style. However, you cannot expect that the dresses for girls should look exactly the same with those for women as they don’t have curves yet. If you can find a tailor in your area, you can also have your girls’ dresses done.
All you have to do is bring a picture of cute dresses you find and your young girl to the tailor. Check out also thefind.com/query.php?query=girl's+vinta.... You can also check at Amazon.Com, I know you can get plenty from there.
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.