I recently asked one of the children in my class to read Higglety Pigglety Pop by Maurice Sendak during morning circle.  He had finished a little more than half the book when he suddenly stopped and came over to me.  He showed me the book and was concerned about the "bad" word he saw, and he didn't want to read it.  I looked at the "bad" word and told him it was OK to say.  It was actually referring to a type of tree.  Whoever though a description of an "ash" tree could be so controversial?