Tattood Baby back pieces

My husband, Julian, had a great idea - tattood baby back pieces!  Not sure if getting your baby tattood is legal or not, maybe in Portland since we're so "weird!".  The advantage is that you do save a lot of money - the baby's back is small, so it would be a lot cheaper to have a full back piece done.  And then it could just grow with them as they got bigger.  You are making a big decision for them when you decide what will be on their back for the rest of their lives, but, heh, you're their parents - you have to make the tough decisions.