on chapter 2: How do the children taunt Winston?

I actually see this as playing more than taunting....

"'Up with your hands!' yelled a savage voice.

A handsome, tough-looking boy of nine had popped up from behind the table and was menacing him with a toy automatic pistol, while his small sister, about two years younger, made the same gesture with a fragment of wood. Both of them were dressed in the blue shorts, grey shirts, and red neckerchiefs which were the uniform of the Spies. Winston raised his hands above his head, but with an uneasy feeling, so vicious was the boy's demeanour, that it was not altogether a game.

'You're a traitor!' yelled the boy. 'You're a thought-criminal! You're a Eurasian spy! I'll shoot you, I'll vaporize you, I'll send you to the salt mines!'

Suddenly they were both leaping round him, shouting 'Traitor!' and 'Thought-criminal!' the little girl imitating her brother in every movement. It was somehow slightly frightening, like the gambolling of tiger cubs which will soon grow up into man-eaters. There was a sort of calculating ferocity in the boy's eye, a quite evident desire to hit or kick Winston and a consciousness of being very nearly big enough to do so. It was a good job it was not a real pistol he was holding, Winston thought.

Mrs Parsons' eyes flitted nervously from Winston to the children, and back again. In the better light of the living-room he noticed with interest that there actually was dust in the creases of her face.

'They do get so noisy,' she said. 'They're disappointed because they couldn't go to see the hanging, that's what it is. I'm too busy to take them."