or, like, proper nouns or something. anyway, this weekend he seems to refer to a particular book--a book with an apple on the cover--as "apple book," and just this morning seems to have refered to another book--which features a gorilla unlocking a lot of doors--as a "key book."
we're not sure, and we know that this is still kinda small potatoes compared to some of elliot's peers who like, know the alphabet, i swear. but really! Apple book! yay!