Safety of candies with cat in house?
I don't see any risk with the candy itself, as you state that it is individually wrapped.  The only issue I see, and it is probably a fairly low risk issue, is if you have classmates who are severely allergic to cats.  I suppose there is potential for the bags to pick up some cat hair...but, now I am getting dangerously close to dealing with a health concern, which is off topic on our site.  So, my short answer is, for the individually wrapped candy...no significant risk.