Have you seen this? Letters and numbers as they naturally appear on butterfly wings. From the website:
For over 24 years the Smithsonian naturalist, lecturer and photographer, Kjell ("Shell") Sandved traveled the world over, photographing all the letters & numbers from the wings of butterflies without harming any.
Twenty-four years! The results are amazing: posters, books, and (of course) your (or your kid's) name in butterfly letters. (Thanks for the tip, Mike, who found this at The Proceedings of the Athanasius Kircher Society.)