Mumbai-based Film Heritage Foundation, a not-for-profit NGO, found these items recently amid a dump of newspapers and magazines at the scrap shop in Juhu and now plans to preserve and exhibit "the archives".
The children are cousins, one of whom is a student of class 6 and another a student of class 5.
Of the 27 named, at least four are workers and functionaries of right-wing organisations, including the Bajrang Dal, officials said.
Police inspector Subodh Kumar Singh and a 20-year-old man Sumit died of gunshot wounds when a mob went on rampage over alleged cow slaughter.
The rate of immunisation is low mainly because of rumours that the vaccines would have a sterilising effect on the children.