Ahh, for many years now I have longed to have a scathingly brilliant idea; unfortunately I have been able to develop a rather dim glow, at best.
I wanted to mention, be sure to speak with the activities director before doing something involving food - some of the residents might be on a restricted diet and not able to eat the treats you prepare.
If the candy and gum are okay, Rochelle has quite a few different gift set ideas on her blog:
link - check out the "gift sets" label and also "directions".