Just interested in the MN verdict on this one. I would let him quite happily (currently he is also trying to grow his hair). He is just 6. DH has issue with the nails based on age, not gender.....or so he says. I think it is the school hols, so what's the problem? Opinions please? Do 6yo dd's paint their nails (I have little experience of girls)? Sure I was using that naff peel off polish by 6.....