Arlington, Virginia (CNN) -- It may surprise the casual visitor at Arlington National Cemetery to see a rubber duck on a headstone or an old football helmet lying in the manicured grass of a fallen soldier's grave.

CNN: STORY HIGHLIGHTS

There were a lot of smiles and laughter as Rubber Duck made its splash but Hofman says he doesn't expect everyone to react with big grins.

CNN: Hong Kong's giant rubber duck

Inflatable Rubber Duck Exhibition, May 2 to June 9, 10 a.m. to 10 p.m.

CNN: Hong Kong's giant rubber duck

Rubber Duck Photo Exhibition, May 1 to May 26, 11 a.m. to 10 p.m.

CNN: Hong Kong's giant rubber duck