I personally would NOT do them.
At 9, she is a child. NOT a miniature adult. Children grow up way too fast. It drives me insane when I shop for "little girl" clothes and all I can find is "mini-tart/tramp" clothes.:irked: Or try finding plain, flat, black patent dress shoes? What's with all the platform heels? What's wrong with little rompers and "mary janes"? They are little girls NOT mini-Britney Spears!
At 9, she will not appreciate the time and expense that enhancements are. She will not appreciate that she must take care, etc...
In any case, she is 9. She does NOT need enhancements.
Not even lil stick-on's.
In my honest opinion, enhancements should be reserved for when she is old enough to wear high-heels/make-up/push-up bras & thongs and I feel strongly that it's innapropriate for a child to wear these things.
HOWEVER...
In the case of a little girl who has a severe nail-biting habit that you've tried EVERYTHING to break...an honestly tried, not just token efforts.
In that case, and only then, would I consider using enhancements.
I would prefer to break a habit that is that nasty early on, before it gets too severe and too ingrained as opposed to waiting until they're teens or adults and permanent damage has already been done.
So, please don't take offense. But I truly feel it's innapropriate.
My girls are 3.5 & 5.5yrs old. I RARELY paint their nails and discourage it to avoid exactly this type of situation where they ask me at 9 or 10yrs of age for enhancements.
Paint them, draw flowers, use decals....
But no enhancements.
When she's old enough to baby-sit and pay for them herself, MAYBE do them then.
hth's and best of luck
:hug: