They oohed and aahed when they unwrapped the presents.
Examples of aah
aah
So Norton's in the spotlight umm-ing and aah-ing and nervously twiddling his thumbs.
From the tv.uk.msn.com
How often do you ooh and aah a play before the actors have uttered one line?
From the washingtontimes.com
We ooh and aah, it's impossible not to be impressed by the antics of God's own cannon.
From the nzherald.co.nz
At Dawn's vegan holiday dinner, guests will ooh and aah over live birds.
From the latimes.com
They swarmed the range to ooh and aah as 14-year-old girls smacked their drives 275 yards.
From the sacbee.com
Malays may also pronounce it without the l, not following the ia but rather a nasal aah.
From the en.wikipedia.org
The physiopathology of AAH combines oxidative stress combined with elevated levels of TNF-alpha.
From the sciencedaily.com
Aah, the things one learns when awake at 3AM on a Saturday night.
From the scienceblogs.com
Aah, I see the previous poster also spotted this, or at least got it right without mentioning it.
From the en.wikipedia.org
More examples
Ooh: express admiration and pleasure by uttering `ooh' or `aah'; "They oohed and aahed when they unwrapped the presents"
Iah ( Egyptian: Ju02C1u1E25, transliterated as Yah, Jah, Jah(w), Joh or Aah ) is a lunar deity in ancient Egyptian religion. His name simply means "Moon". By the New Kingdom, he was less prominent than other gods with lunar connections, Thoth and Khonsu. As a result of the functional connection between them he could be identified with either of those deities.
Expression of amazement or surprise or enthusiasm; Expression of joy and/or pleasure; The exclamation aah; To express amazement or surprise or enthusiasm, especially by the interjection aah; To express joy or pleasure, especially by the interjection aah; To say or exclaim aah; Indication of ...