She is almost 11 now, but we are coding every day for almost a year now (I am logging the progress here: https://github.com/jackdoe/programming-for-kids). Its often we go to the number line :) but because we usually make games, and it was easy to get negative numbers when you go out of the screen, so it "clicked".

The whole game was her idea and we started working on it about 5 months ago.