-You could find a small print at home/$ store of a favorite character and have that character sign it
-Mickey rice krispie treats (great use of extra snack credits at the end of trip too)
-There are great packs of mini-erasers in the Japanese store in Epcot
-Pens, pencils, straws, lollypops, pins, pressed coins--all great ideas from other posters!
-There is a bath store in Disney Springs that sells $5 "bath bombs" that release mickey glitter in a bath tub
-Inexpensive hair barrettes, jewelry, etc. can be found in many gift shops
-small set of Legos from Disney Springs
Lego shop
-Star Wars shop in HS had some inexpensive odds and ends
-matchbox of the Cars/Planes vehicles
-free trading cards from Sorcerer of MK game