How young do you think is too young for girls to start to wear nail polish? I'm a very girly girl and wanted to paint my daughter's toenails and found Piggy Paint. It's non toxic with no harsh ingredients made just for little girls. It's about the same amount as Opi. Right now she has pink toenails and I think they are super cute but my MIL hates it. Oh well, she already raised her kids.