No matter how much you try to imbibe healthy oral habits in your kids, kids will be kids. You need to pamper them with chocolates, ice creams and candies. After all, childhood is not going to come back again. With all that pampering, the teeth need some extra care. Cavities are caused due to bacteria or other microorganisms in the mouth which digest the food particles stuck in the mouth and turn them into acid. So if there are no food particles, there is no reaction, and thus no cavities.