Fred, great technique when you have the supplies to support. I have also used an assortment of gums and candies including those with dietary restrictions. One of the questionnaires I would have students fill out, especially for shorter duration courses of 5 weeks or less, included a brief series of questions about treats they prefer and if they have any dietary restrictions. The stores that offer bulk purchases and also offer specials tend to be great for stocking up with these types of positive reinforcement techniques.
James Jackson
