'Educational' refers to the process, not the object. Although, come to think of it, some of my teachers could easily have been replaced by a cheeseburger.
Terry PratchettThey were small, brightly coloured, happy little creatures who secreted some of the nastiest toxins in the world, which is why the job of looking after the large vivarium where they happily passed their days was given to first-year students, on the basis that if they got things wrong there wouldn't be too much education wasted.
Terry Pratchett