My daughter's first word (After "Mama", of course, but it could have been before "Dada") was "duck". At least we think that's what it was. With the mouths on her parents, it could've been something else. Let's go with "duck".
So I feel duty bound to link to this.
And if you enjoy that sort of thing, you'll like the Fortean Times simulacra photos (try Bugmenot password possibleyeti), home of the Cappuccino Antelope.