D.K.
I am in the same boat my daughter is turning 16 too.. So I would just look at what she likes to do.. Is she a clothes freak (buy her the 1 outfit she has wanted or purse etc) as for something keepsake for a car nothing comes to mind.. The only suggestion I could say is take her & let her pick all the car accessories (like seat covers, steering wheel cover etc..)Sorry no more helpful but with out knowing the typw of girl she is it's hard.. Maybe a wallet of her choice to carry her new license in..