As a fourth birthday present for my eldest, we got him some spiders web elbows done.
My two year old is now the hardest lad in his playgroup with his Borstal teardrop.
My daughter is only nine months old, and she cried and cried throughout the process. After she calmed down, she was the first to agree that the swallows on the backs of her little hands only enhanced her childish beauty.
On a more serious note, perhaps all children should have their addresses and phone numbers tattoed on to their faces, in case they get lost.