The Prince of Wales was left in a fit of giggles after catching sight of Prince Harry - immortalised in papier mache.
Charles cried out "Harry" when he was confronted with a row of royal heads, made from old newspapers and wallpaper paste, and pointed to his son - a bright pink ball, with eyes, a nose and a ginger beard and hair made from string.
Charles and wife Camilla came across the art display as they toured the Sandringham Flower Show and were in good spirits, joking and laughing with visitors.
At one point the Duchess playfully patted Charles' bottom a couple of times to encourage him to move along.