Myself and my eldest son both have our Scottish family clan badge tattooed on our right shoulders. They're beautiful, yet discrete. You'll never see them unless we're shirtless, or wearing tank tops.
I've told my other boys that they're welcome to join us when they turn 18, but by no means am I pressuring them to do so. My number three son turns 18 next month, and says he's going to do it.
See, now that was well thought out and is something that has personal meaning to you and your family. I like that.