There are lots of parents.
I think a smartwatch that monitored their conversations with their children then described ways they could improve their educational or emotional content might appeal to many people.
kind voice [||] Improved since last week!
encourage to read [||]
You are encouraging your children to read!
word vegetables used [||] slightly less emphasis on vegetables
It is like fitbit for kinder gentler more effective parenting. automatically uploads to the laptop for big graphs and full menus of preferred parenting styles.
The smartwatch could also vibrate slightly if it perceives the parent is speaking harshly, to remind the parent to speak more gently.