Depends on the age. I really like Wizard 101. It's free (up to a certain level) and good for kids around 10-12, but appropriate for people of any age.
I'm an adult and used to play it a lot. And if they like it, it's $5 a month ($60 a year). It's an online mmo.
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.