My kids read all sorts of things some of which I agreed with and others not so much. It depended on the age and maturity just like movies.
My kids had a number of Bibles to read but yes, I sure would have made an issue of NWT! then it would have been a long sit down and real study of Bibles, Greek, Hebrew etc.... lucky for me they were disgusted enough with jw-ism they did not to want to read the NWT.
Today they are Christians each with their own churches they are very happy in.They love jw dad but do not agree with jw's at all.