I've got two daughters, and while it's my oldest who's experiencing her first centerfire rifle this year at the age of 11, the one you ask about in that photo is my youngest - she was 7 years old when that pic was taken.
The two make quite the pair - they are hyper-competitive with each other when shooting our rimfire "steel challenge", so much so it's kinda scary. But change the activity to squirrel hunting and they turn into a killer team where the youngest is happy to do the scouting and the oldest does the dirty work:
Thanks all for your kind comments - to those who are still waiting to get their kids involved - these are the best days of my life - you are in for fun beyond your wildest dreams!
Cheers,
Brobee