I tried to explain recursion to my son with the monks from "Towers of Hanoi": What is a monk handing out to the next one? Is he waiting? What is a monk's contri

I tried to explain recursion to my son with the monks from "Towers of Hanoi": What is a monk handing out to the next one? Is he waiting? What is a monk's contribution to the answer? How many monks do we need? What does the last monk do? Which monk gives the answer, the first one or the last one?