Dutch design collective Studio Diip has added wheels and sensors to a fish tank so that its inhabitant can drive it by swimming in a certain direction.
As the fish swims around the transparent tank, a webcam positioned above the water tracks its movements – detecting the contrast between the fish and the bottom of the tank – and relays them to an Arduino programmable microchip, which then mimics the fish’s movements by driving the vehicle in the same direction.
Via Dezeen.