New "word"

Last night Will and I were playing with Megan (making her stand to play) at the coffee table for several minutes.  This was after having her walk 12-14 steps across the room multiple times so she was getting tired.  It wasn't quite her bedtime yet but she went into crazy tired mode so I asked her if she was tired and wanted to go night-night.  And she looked at me and said "ni-ni" - it sounded perfect just missing the 't' on the end.  I looked at Will to make sure I hadn't imagined what just happened and he said "I heard it too, she copied it perfectly".

In true parent form, I tried again to see if she would say it and she said "ni" the second time.

Megan has had the 'n' sound for a while but this is the first time I have heard a distinct 'i' sound and definitely the first time she has said 'night'.