David
the frog story, like many others of it's ilk, leads me to search SNOPES to determine the possible truth in this type of lesson.
http://www.snopes.com/critters/wild/frogboil.asp
the lesson is still appropriate even if no frogs wait around to hear it.
Have a great day!
Marc

pediatric P.A.
(in practice since 1975, same office)
Brooklyn, NY