Just bought some for my niece's (12) "Mickey Surprises" for next week. In addition to the above items, I would add
-T-shirts
-PJs
-body wash (Target had Disney travel size.)
-spray fans (I got just a regular, small fan with foam blades at Cracker Barrel. It had a Disney character and has batteries. I almost went back to buy one for myself because it works pretty well.)
-hat/Mickey ears
-Disney necklace/earrings
-sunglasses