You don't wear makeup?
I use a lot of my own makeup for recitals and other performances. She is able to put her own makeup on and she is just 8. It looks beautiful. I started by applying the makeup since I could do it much faster. She has learned by watching as I apply the different items to her face. I occasionally use a black eyeliner and always use eye brow pencil but that is only for the stage. You cannot even see her makeup from a few feet away but she is not washed out looking in the harsh lights.
Products I use:
99% Mary Kay
Mineral powder for base, needs a brush, together about $30. They will let you try on shade after shade after shade. And when you get it home and have it on in different lights you may decide it is too dark or light and you can exchange it.
Eye shadows, I use black onyx, whipped cocoa, spun silk. I know the names of those but they have new stuff with different names now but I put on the lightest, then the brown in the crease, and the black goes on the outer edge and is blended in very well. I have had people, complete strangers, come up and comment on my makeup. Even the youth at church have asked their moms to have me show them how I did my eyes.
This picture shows how I do mine. The darker shadow that is under the applicator is where my black goes and it is not much darker than this.
http://www.life123.com/beauty/cosmetics/eyeshadow/eyeshad...
Blush can be any color you like on her skin tone. I like a darker blush, like a brick red or plum. I have prominent cheek bones and I apply the blush under the edge of the bone to accentuate it. I do not do apple cheeks like so many do.
Then I use the Raisinberry lipstick with almost everything. I love that it is not purple tinted and not very bright, it does not stand out and say HELLO, I HAVE LIPS!!!! It is matte and does not stand out. I used to wear Plum but they have changed and updated a lot of things.
Then I use my standard Maybelline Great Lash Mascara. I just cannot seem to make the break.
Keeping it light and minimal will do the trick. I think if you have any experience in putting your own make up on then you will be able to tell if hers is just not right.
Making an appointment with a Mary Kay rep is a good idea too. If you go to the website you can find one local to your area. Please inform them that you are not interested in the total skin care package but just want basic make up for a 13 year old girl. They should respect that and not try to do a big sell on you. If they do just keep telling them you are only interested in basic glamour and not the skin care sets.
You should not have to spend of $50-$75 if you buy everything I mentioned above. The base powder and brush together is about $30 then the eye shadows can be bought individually, they often have them as a duo but you always wear only one of the colors and that ends up being a waste of money in my opinion. I like mine separate so I can buy the ones I want to use.
She will most likely like a lip gloss instead of a lipstick, that is cheaper and you can buy any lip gloss at Walmart or anywhere else for less.
This person should be a make up expert, applying and selling. Listen to the things that are good for you and perhaps file the rest away just in case you need the idea some time later.