An old school friend has posted pictures on fb of her colouring her blonde daughters hair bright red with proper permanent dye. Child is 7. Everyone is commenting, saying "it looks fab". I dye my own hair, it's harmless as far as I know, but is it ok to do a 7 year olds?? I really don't know now. But then I'm very tired and it's none of my business so I guess this is a bit pointless really.