I had hoped that our Christmas holiday with my monolingual mom would yield some results in term of active German vocabulary, but not even the day spent with my friend and her two daughters (almost 6 and almost 2, the former very talkative) did.
Then two days ago, our also-almost-six-year-old bilingual neighbour came over, and as the two were playing tent and hiding under a blanket, my daughtere’s usual “encore” for “again” was replaced by a spontaneous “nochmal”, word which I otherwise usually only get when she repeats it after me. And even then she usually nods and says “encore”.