I remember so much studying that book at a very young age,those pictures stuck so vividly in my mind of the kid with the doll and the little doggie and the all that destruction and fear,I can remember an assembly speaker forcefully saying,'Children,Dont think you will survive Armageddon just because you are young.'
But Fred Franz who had a lot to do with publications of that era when relying to the question ,would even the little children die at Armagedon said,'Nits become lice and little rats become big rats.
That is the hard faced rationalizing behind this book.