Getting your kids to brush their teeth is no easy task, just ask any parent (I am not one, but I'm pretty sure this is the case). That's why this letter from "the Tooth Fairy" that this father wrote to his son is so very useful. If you want your kids to brush their teeth, make them think that the Tooth Fairy actually cares about the condition of teeth! BAM! Now you can manipulate them into doing something important using money and also an imaginary figure who is not you—it's perfect!