I present all my grand kids with a little CZ Scout 22 rifle at age 3 or 4.
My youngest grand daughter just turned 7, she got a Sig Mosquito 22 LR (with pink frame of course).
Another Grand daughter turned 16 last month, she got a Sig 228 9mm.
And yes they both can shoot each very well. The 7 year old loves shooting pistol and loves her new pink one. I have several of her targets up on my refrigerator.
The 16 year old feels good about being able to participate in the home defense scenario.
I think it's safer to give a 16 year old girl a loaded pistol than to give her a loaded mustang.