Younger sister wants to do skincare, what to do?

Hi, I am a 21M, my younger sister aged 12 has been getting influenced watching our cousins by seeing their makeup products and skin care products.

Recently even she has developed an interest and is asking me to get her some of it. I have no idea what products would be safe for a kid of such age, and should i even get her any.

I would prefer getting her something simple with minimal chemicals, can you suggest what i shall get and what are the good brands which manufacture good quality skincare (also she liked the idea of face mask and candles)

Please help, thank you.