Here's a rather dark and blurry (sorry, bad lighting!) photograph of the finished result:
I know what you're thinking, 'Eh. It looks sloppy'. It's okay, I'm thinking it too. I expected it to be abstract, just maybe not this abstract. Oh well! Just imagine the possibilities here! This was a very rushed, haphazard trial, but if you took the time to carefully coat the celery heart with a layer of paint and to carefully stamp the paper with the root, it could result in something absolutely beautiful. I encourage all my celery-loving bunny rabbits to experiment with their leftovers this season. I might attempt it again on a larger scale to make a unique wrapping paper. I'll let y'all know how it goes!
For anyone interested, here's a photographic play by play of the process: