Be aware that tooth decay is related to eating foods rich in sugar and cooked starches too often, especially foods that stay in the mouth longer because they are soft and sticky. Cavities can begin in between the teeth before you can see them. Rinsing with or drinking water after these snacks would be helpful. Therefore, your goal as a parent is to encourage moderation and to teach good food habits early on. Get them involved in planning and preparing meals. Encourage your child to drink water frequently.