Tattoos are body art, mostly a permanent one. So they don't come with an age requirement. Girls as young as 3 go for (usually the parents take them for) an ear piercing. Neither there seems to be an age to apply henna or mehendi. We used to have watered temporary tattoos on our wrists as kids. read more
Whether legal or not 13 is not the mature enough age to start getting tattoos. Tattoos are permanent marks on the body and it is a lifetime commitment. Once the ink is in the skin, there is no way it is going out. TO have such a lifelong commitment, it is expected the person to be of mature age and sound mind. read more