I dont have kids, and I do have piercings and tattoos. I had my first piercings in my ears at 13 and I think that is ok at that age, but tats no, not untill someone is older, to me that is 18. Piercings can be hidden or if you take the studs/rings out they will close up but a tat is with you for life, so I think you have to be adult enough to have one.