You can make your own invitations using your computer at home. Theses are what they call printable invitations. Online you can find printable, as well as printable cards.
You can find more information here: makeowninvitations.com.
Ask that they cut the cardstock in half to make cards sized at 5-1/2" x 8-1/2" (14 cm x 22 cm). Request that the decorative paper be cut in half. Then, 1/4" (6 mm) should be trimmed from each side.
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.