When I worked in the Intensive Care Unit here, we would always get a TON of cookies/candy/bars. One the most unique things we ever got was pizza from the family of a patient...they came three times so that day, evening, and night people could each have some!
Another thing that might work well would be to bring in a sandwich bar, where they can fix their own whenever they have a chance to during a shift. Some bread, cold cuts, cheeses, something for vegetarians, veggie fixings. Maybe some chips to go with?
The hand cream is also a good idea...washing your hands often does make them chapped!
I just talked to my mom who has worked in a LTC facility, and also in an Alzheimer's Unit. Her suggestion was a box of nice candy.
"Eating peanut butter is a sacred act, not to be defiled by pork or its substitutes."
New favorite bumper sticker: "Go Green. Recycle Yourself. Become an Organ and Tissue Donor."