My DD3 just amazes me with the words she uses casually: concentrate as in "please be quiet so I can concentrate on my activity!", taunting "why were the reindeers taunting Rudolph?", version "Do you like my version of this nursery rhyme...(then makes up a poem), flatulence "HA, sorry. That was flatulence....(wild laughter), structure "I am going to try that climbing structure" (said at the park at two to another child who looked at her blankly... and conversation "Let's sit here and have a conversation together" said at two to other children who also looked at her blankly and so on.