Until my daughter was 4 we had fluoridated city water, called one of the “Ten Great Public Health Achievements” of the 20th century by the CDC. If you have city water, you’ll be giving your children fluoride by default, unless you use only bottled water for everything, including cooking. Our dentist explained that even if your child doesn’t drink tap water, eating pasta cooked in fluoridated water is enough and no more is needed. I didn’t think much more about fluoride until we built our current house, which has well water.