"Hassani has designed and built, by hand, a wind-powered ball that is heavy enough to trip mines as it rolls across the ground. Each $50 device looks like an artwork inspired by a starburst. In the middle of the Kafon is a 17kg (37lb) iron casing surrounded by dozens of radiating bamboo legs that each have a round plastic "foot" at their tip. Inside the ball is a GPS unit to map where it has been – and in theory cleared of mines. Around the iron ball is a suspension mechanism, which allows the entire Kafon to roll over bumps, holes and so forth. In all, it weighs a little more than 80kg (175lb). The idea is that it is light enough to be pushed by the wind, but heavy enough to trip mines. Hassani thinks that humanitarian organizations could take Kafons with them into areas suspected of being mined, and then let the wind do the dangerous work."

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