Dandelion stains

When I went to get Clara up from her nap yesterday, I noticed she had brown stains on her shirt, arms, and legs.  I smelled the spots but they smelled fine.  I asked her what the spots were.  "Poop!" she replied.  "Clara, it's not poop.  What is it?"  "Poop!" she answered again.  Trying another tack, I said, "Where did it come from?"  She looked me square in the eye and answered, "My bum!"  (I later figured out the stains were from dandelion stems that she'd smuggled into her crib).