Fig. 1.

The radial water tread (RWT) maze is a low-cost, low-maintenance apparatus that is efficient to operate. The apparatus consists of a 30-inch circular galvanized enclosure with nine holes placed in the sides at regular intervals, as shown in (A) a photo and (B) a schematic drawing. The holes are rimmed with plastic pipe fittings. Eight of the holes are blocked and serve as decoys. One of the holes leads to a dark, escape ‘safe box’ hosting a comforting heating pad, food, and gel. All holes extend outward similar distances before either terminating or bending at a 90° angle to prevent direct visual determination of the actual escape route. The tub is filled with about one inch of water pre-warmed to room temperature, and a bright light is positioned directly over the entire apparatus to provide the escape incentives.