Three words.
Rock.
Paper.
Scissors.
Best game invented.
In addition to the dress up box, girls that age love to feel grown-up and glamorous and to that end, makeup! They make stuff for little girls, but a regular lightly colored lip balm, or lipstick samples (ask your neighborhood Avon lady) would be fine, and some little girl nail polish (the non-staining, peel off type specifically made for kids) and girlish perfume would go over big time. You’d be the coolest ever if you came up with stuff like that. 