My piano, your piano

Sierra loves to play on the piano, and sometimes I hold her on my lap, but other times I just put her on the bench and let her sit by herself. When she sits alone I usually put her at the Baldwin, which is the piano my students play on when they come for lessons. I put her there because the bench is at a better height for her (I sit very low, so the bench at the Steinway is always set super-low and the keys would be at about eyebrow height for her). Because of this routine, she has somehow come to think of the Baldwin as her piano. Now when I sit her on my lap at the Steinway, she'll point and point to the other piano until I put her over there on her own bench!

Sometimes she's ok with being on my lap, and I often take her fingers and pluck out little tunes. Up until about a week ago, she would usually yank her hand out of mine so that she could do her own thing, but just the other day she let me play all of "Twinkle, twinkle" and she seemed rather intrigued by the whole thing. The next time we sat at the piano, she held one of her hands back to me, and had this look on her face like, "Lady, don't you get it? Aren't you going to make my hand do something here??"