Dont forget the most important fundamental - and this is an issue that must be stressed to umpires often (especially umpires on this forum
)
Let them play ball.
They got plenty of time, you are putting too much stress to even be thinking about this at that age IMO. Dont be one of "those dads" who often ruin the sport for their DD. Even if you want to do that to yours.. dont do it to some other coach, expect that of some other coach, or especially not to someone elses DD. Limit it to just your kid.
IMO, its not even a sport at that age, its a game and you guys are just parents bonding with your kids and its just fun - its hardly coaching.. teaching but not coaching..so
Let them play ball - have fun.
OK off my soap box...