It’s possible to talk to children about politics without leading them in one direction

My six-year-old son announced, from the back of the car, that he was backing Boris Johnson. My wife, who’s voting Lib Dem, was horrified, accusing me of indoctrinating the boy; I resisted the temptation to film a video and post it on Twitter, to be retweeted by Tories and hate-tweeted by others accusing me of brain-washing, even child abuse.