This is a good question and also a little tricky and it can be dangerous to do lots of physical activities indoors especially in cramped or smaller homes or in houses with delicate and breakable items.
Anyway, my idea is to hide each childs favorite treat, toy or whatever they look forward to, before they wake up, after lunch or snacks. And to make a game of it, the one who finds it first gets to have it.
You can substitute other games for this as well, like the one who shoots the most hoops or putts the most or jumps high 20x first or does an elaborate exercise first, etc. Etc.
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.