Place the crackers on a serving board and fold the sliced chorizo in half to form a hat. Place one piece on top of each cracker.
Put the goat's cheese in a piping bag and pipe a white rim across the edge of the chorizo, then pipe on a beard and a dot on the top of the hat.
Place celery slices on top of the beard to form a moustache. Use the capers to make eyes and a nose.