My 4 YO son (who is white on the rare occasions he has a clean face) came home from nursery and announced "I don't like XXX because she has a brown face." Was v shocked but struggled to know what to say beyond "that's a bit silly, like saying I don't like you because you've got grey eyes." Should I do or say anything else? He has gone through a sexist phase too "don't drive the car mummy, you're a girl and girls don't drive" which was funny rather than offensive. Instinctively I feel I should just leave it rather than draw more attention to it. Does anyone have similar experiences? Should I mention it to the nursery staff. He is actually a nice little boy most of the time!