"Oh joy" (3)
(Other definitions for fun that I've seen before include "Jollification" , "entertainment" , "'Merriment, playfulness (3)'" , "Light-hearted pleasure" , "Light-hearted amusement, jollity" .)
(Other definitions for goody that I've seen before include "Expression of childish delight" , "Hero in book" , "married woman of low rank" .)