Just a gentle neutral soap or face wash.
Clinique is good too.
They have gentle face washes and for sensitive skin. And it is hypoallergenic. My 10 year old daughter uses it.
We just went to the cosmetics counter at Macy's, the woman taught my daughter all about it, and how to use it. And we got her the most gentle regime for her child's skin. And it is non-drying.
Remember, they have kid skin. Not adult skin.
Don't use body soap, or baby wash, as a "face" soap.
It is too drying and not made for "face" washing.
Dab, using a Q-tip, rubbing alcohol right on the zit.
It will disinfect it, prevent from infection, and dry it out.
But only use it RIGHT on the zit.
Not on her whole face.
Or get those zit creams. for spot treatment.
If it is a bug bite, just put a dab of Calamine on it.
That pink stuff.
Works perfectly on my kids with bug bites.
Tween ages are from 9-12 years old.
It is good to teach a girl how to care for her skin.
I have done that with my daughter already.
And she does her face skin regime when she needs to.
Using Clinique.
And it lasts... a LONG time.
So it is not expensive from the initial cost.
Because, it lasts a long, time.
The "American Girl" book series is also good.
"The Care and Keeping of You" teaches a girl about how to care for their body/skin, and their body changes etc. And it is for the Tween ages and is appropriate and made to be discussed with Mommy.
My daughter has that. From before she was her current age. I think it was when she was about 7 that I got it for her.
Just check it out online, most book stores or Amazon has it.