...when DD7 has given up on fantasy novel bedtime stories and has you read The Number Devil...
...then writes him a note asking him to teach her too, by appearing in her dreams...
...when she loses a tooth before getting a reply, leaves a note for the tooth fairy asking her to have a talk with the Number Devil because "I expect a response"...
...at the Number Devil's direction, is now working through the Penrose the Cat books at night. The rest of us read before we sleep, she takes a whiteboard to bed and works out math concepts. She is seeing patterns I never noticed, and articulating them clearly. But she still thinks she's not a 'math girl' in the classroom - apparently that means whizzing through the most worksheets.