Today Joseph introduced me to "Dr. Steam" his miniature little sister. She has blue eyes and lives in a blue tree house (in our Fichus tree). She likes treats and m&ms, the letter T, playing with all her friends, the playground, and playgroup. Also, "she knows how her words do" which I think means she knows how to read and write (this came up while we were writing her letters).
I have no idea if Dr. Steam or her friends "Cherry-cherry" and "Chi-cho-cha-wa" will stick around. But, I LOVE the imagination. This was the most elaborate story I have heard him weave so far and it was a wonderful moment. (If you didn't know, my imaginary world was quite special to me as a child and I even did my senior psychology research on children with imaginary friends!)