J.T.
L., you poor thing! My son had rotavirus for 3 weeks once and the doctors took FOREVER to diagnose it! I actually diagnosed it for them....however, dealing with the diarrhea, kuddos to your teachers! Mine sent us home. No questions asked. I eventually broke down and gave him the chewable acidophilus. The kind that is still active and needs to be refridgerated...not the one I just bought for a stomach virus that doesn't seem to help. It worked like a charm! Two days later he was clear. Not sure your situation but thought this may help.
As for the gifts. I am an Arbonne International Independent Consultant and can tell you that everytime I have given lotions and aromatherapy to teachers/nurses/secretaries, they have loved it! And yes, Koreans take good care of their skin so I think they will appreciate it. Any gift from you will be appreciated. They are caring people that seem very concerned about your son. I hope everything works out for him. This must be very painful...we broke down, (I don't allow mineral oil or vaseline in my home..) and bought the vaseline to protect my son's skin. It hurt him to even clean his bottom. Anyway, best of luck!