With my children, I make it to the Pittsburgh Zoo and PPG Aquarium several times a year. We have visited at least a dozen times since the polar bear exhibition opened in 2006. This was the first time the bears were enjoying themselves in the water while we were inside the viewing tunnel underneath the pool. My oldest son became a bit fearful of the bear hanging in an apparent suspension just above his head. For three minutes the bears interacted with each other while a crowd gathered.