DS does the "no, stop I don't like that" thing already. He says he does that but the child still does it. He says the teachers put the child in a time out sometimes but "he still does it".

I've tried telling him not to play with the kid but its a power thing, this child is younger but bigger and he draws him in with games DS loves, then tells him he doesn't like him or that he can't play anymore etc.

I don't like to speak ill of another 3 year old, it isn't his fault either. But I think it needs to be managed better and I definitely don't want my son becoming a perpetual victim because of this.