Baby 's Footprint tattoo?

ok, I have two daughters Chloe and Elena, i was thinking of getting my first child's right foot and my second child's left foot tattooed on me and i was going to put their names inside of the foot. or should i have both of their footprints? any ideas if i should have it in black ink for the foot and the name or should i get the name a different color? And also a good place to put it? i am thinking my right shoulder..I want this tattoo to be really pretty. Thanks!!!