This past weekend, my muse returned. She's been doing the polka in my mind ever since.
I wrote a first chapter and a few other bits and pieces. I'm letting the story unfold in my head for now. I'll make a point of recording it in earnest next month for NaNoWriMo.
A small portion of the first chapter was inspired by moments like this. That's my son back when he was 4 months old. He's just shy of 6 years old now.