Okay, maybe not ALL natural, but something on your card should involve something from nature on your card.
You could use dried leaves or flowers/petals, or use a leaf to make a leaf print. These are just suggestions - you can use anything you want, as long as your card includes something that is considered 'all natural'.
Kim's card is soooo creative, check it out:
Stunning result, Kim!
I can't wait to see what everyone else comes up with on this one...