My favorite was the "Abdominal Snowman" and "My mom knows all about plants ant ##$% she works at subway."
I've heard a few funny ones two
Kid wantind his water bottle back after I took it to clean becuase he got nasty river water in it - "CHIEF I'm having Hydrovation problems."
Kids at outdoor education program in rocky mountains.
"Why did you make the rocks this way"
"Why did you plant the trees so close together"
"Why don't you clean up all this animal p##p"
(looking at gophers) "Oh look at the little lizard!"