Most raw foods are great for teeth -- both yours and your kids. As you chew raw foods, they massage your gums and actually help to clean your teeth. Fresh fruit, like apples, oranges, pears and watermelon are all tasty and tooth friendly, and anything that creates more chewing is better. Fruits do contain natural sugars that can lead to cavities, but they're much better than any kind of processed candies or other kinds of sugary treats. Make sure the fruit is fresh; canned fruits contain a load of added sugars and preservatives that aren't good for the teeth. If your kids are reticent to eat hard fruits like apples and pears, spread a small amount of natural peanut butter on slices to entice them.