Squirt might not be radically expanding his vocabulary at the moment, he is developing a sense of humour :-D
What started off with an actual spot on the wall tiles in the kitchen has changed into a little game. One day, about a month ago, Squirt tried to pluck a drop of dried-something off a tile with his little tweezer fingers, to put it - where else? - in his mouth. When he found out it was still there, he tried again. And again. And again. Until I sort of took pity and cleaned the spot*. This didn't faze him, at all. He kept on pretend-plucking at imaginary spots, putting bits of nothing into his mouth, and he knew it :-D I still think this is so funny, that I keep prompting him to do it at least once a day... Yesterday, I pretended to take something out of his hair to eat, and he responded by doing the same :-)
I guess both me and Squirt are quite easily amused, at times ;-) Either that, or I don't feed him enough, and he is despairingly waiting for me to take a hint...
* Interesting, though... How I cleaned the spot out of pity - not because I was aware that it was there ;-)