Originally posted by karahd
I just told my coworker and she has a DS and she says she can't blow on her DS to make it do anything.
...

She would have to have one of the games that makes use of it. I believe it worked via the speaker as well.

A quick google search came up with this game as an example:

http://nds.gamezone.com/gamesell/p32466.htm

"blow into the Nintendo DS mic to fire spitballs"

You can't just blow the DS to make it do what you want. Its not like her boss.