Yesterday (or night).......

Kali's got a new word that she likes to use. Whenever she talks about the preceding night's events, she refers to it as 'yesternight'.

Using it in a sentence:

"I stayed in my bed all yesternight."

I think it's generally a sign of intelligence that she's forming her own words in that manner, but I've started the process of trying to get her to use yesterday. It's going to take some work because she keeps telling me, "No, Daddy! It wasn't yesterday! It was yesternight!" The logic is there, but the grammar needs some work.