Don't know how much money and/or time you want to put into this - - -
Those little folding scissors - make sure they are sharp - but they are so handy to have in one's purse.
Little packs of tissues/Kleenex
I like candy - but I'm trying to think of things that can be opened/had around fabric that would/could be minimally messy.
Nancy's Notions had a set of two screwdrivers with very short handles.
Rotary cutter cases - can be made. I tend to think those things are in the same category as toaster covers - I don't use them - but some like them.
A hand sewing kit - with places for thimble, scissors, thread, and needles - I would skip filling it for two reasons -
good contents are expensive - and experienced sewers have their own ideas/preferences for the contents.
A couple of the ladies in our group have very small, but useful kits. Less than 6x6 inches. Mary Lou's is about the size of a pocket pack of tissues.
Scratch/note pad/paper and pen/pencil.
A couple of empty zip lock bags to hold "miscellaneous" when miscellaneous accumulates.
Band-aids.
Aspirin/Tylenol/Advil -
This seems to be turning into a first aid kit!!!