Pack a toothbrush with your kids and get them brushing after lunch each day. It will not only help reduce cavities, but it establishes a good dental care pattern for life that can save them from needing dental work up the road. Ideally, they would also floss every day at lunch. Big kids should heed this advice as well. You want to keep your gums healthy, and flossing as well as brushing every day after eating goes a long way to achieving this.