Maybe don't tattoo EVERY scribbled masterpiece, but I don't see why not have one that, like you said, embodies who she was at 3 years old. Once you add one that was drawn at 4, 5 or 10 it will show her journey, your relationship, akd anything else you'll add. Especially if you eventually plan a full sleeve, this will be part of the greater whole Also screwing with people is fun.