Since you didn't list anything:
Food - I doubt that MRE's would go over very well for a kid. Energy type bars that she might like. (Have her try some out beforehand)
Gum, crackers, pop-tarts, cheese, *peanut butter* (caution with this one), jelly (packets like you get in restaurants) can spaghetti ? (be sure to have a can opener)
Water/juices
Clothes - consider weather changes. Also, it wouldn't hurt to have some a size larger - just in case you forget to rotate. A supply of underwear, socks.
Meds
Toys/games (keep her busy, amused)
Flashlight/batteries
Some form of ID - and pictures of family with names/ages. Location/phone #s of other family members.
Radio
Sunglasses/hat/gloves
Hair bands? Barrettes. Comb/brush
Toothpaste/brush/floss
Wet wipes, small bottle of shampoo(?)
Sleeping bag/blanket/pillow(?)
Suntan lotion/ bug repellent
I can't think of anything else right now, but, I'm sure others will contribute.
Best of luck.
Also, it wouldn't hurt to "practice" bugouts/camping with her.