Swan Boat in Philadelphia Zoo

On 22nd March 2008, our good friends, Yudong and Yue took us to the famous Philadelphia Zoo in Philadelphia. They have purchased a family yearly membership pass and therefore they visit there very often. Every time they visited the zoo, their son, Ethan, always liked to take the swan boat ride. Since Ethan weigh only 10% of what his dad was, the swan boat was tilted.

When we were there, there were about 20 swan boats in the small lake. All the boats looked the same, white body, long neck, and black nose. Because of the tilting, we had no problem at all to spot which boat Ethan was in.