Last night Naomi had Susie (at the time 9 months, 26 days old) on her lap while she was on the computer and Susie kept kicking the laptop. While she did so I said "Kick, kick, kick…" in an attempt to make her smile. (She did.)
And then she said "Kick." She said it at least twice later.
I taught her her first word!
EDIT: Well, her first fully-pronounced word.