Like A Tumbleweed  

Sustaino has an interesting example of biomimicry - Minesweeper.

It's round, made of bamboo and biodegradable plastic, inspired by a toy, and is a mine detonating device. This is biomimicry at its best designed by an Afghan refugee. At 70 kilograms (154 lbs), it activates mines as it rolls along the desert sand or grass. To date, there is an estimated 110 million mines scattered across 70 countries. Mine Kafon is designed using a basic GPS device and experts are seeing this as a common removal method. At only a cost of $40, I can see future races on the horizon.