Answer:

OOH

Answer	Crossword Clue
OOH	".. la la!"
OOH	Aah's partner
OOH	Circus-goer's response

OOH	Sound of delight
OOH	"Look at the fireworks!"
OOH	Expression of joy
OOH	Act awed
OOH	Sound of amazement
OOH	Wow!
OOH	"So pretty!"
OOH	"Sweet!"

OOH	"I'm impressed!"
OOH	Pleased sound
OOH	Expression of wonderment
OOH	.. and ah
OOH	".., That Kiss" (1931 song)
OOH	"I just had an idea"
OOH	Sound of admiration
OOH	"Impressive!"

OOH	"That's gotta hurt!"
OOH	Cry of amazement
OOH	Reaction to fireworks
OOH	"Great stunt!"
OOH	"What a catch!"
OOH	La-la preceder
OOH	"So cool!"
OOH	Cry of delight

OOH	Fireworks-show exclamation
OOH	"Look at that!"
OOH	"That's impressive!"
OOH	Response to an unveiling, perhaps
OOH	"I'd like one of those!"
OOH	"How impressive!"
OOH	Express awe
OOH	Reaction to a burst of fireworks

OOH	"Wow!"
OOH	Express amazement
OOH	Sound of wonderment
OOH	"Golly!"
OOH	"Gosh!"