Massoud Hassani’s extraordinary Mine Kafon is a giant, wind-powered, bamboo-framed, toy-inspired sphere which—with the aid of GPS—rolls over unexploded landmines and tracks the clear, safer paths that it leaves behind. Hassani developed the piece after reflecting on his childhood in Kabul, and on the toys that he and his friends played with, often losing those toys when they were carried by the wind into areas known to contain landmines.
This is a beautifully designed object. However, there are problems with Hassani’s approach to clearing landmines. This article discusses the inefficiency of the mine kafons. http://www.statisticsblog.com/2013/01/simulation-of-landmine-clearing-with-massoud-hassanis-mine-kafon/