In lego batman a similar thing happened to me. When I got the 249th brick, It opened a secret level where you have to rack up a certain amount of points by meticulously destroying everything. Once I beat that level I got the last brick.
So get all the bricks you can and look for a gateway that's locked. In batman it was a gold archway in the Gotham city park that you needed 249 gold bricks before you could build it.
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.