Pretend to be on the hunt for a grumpy witch named “Knotty” who lives somewhere in your child’s hair. Find her, “chase” her out (brushing your child’s hair to do this), and then tell your child that she’s escaped—to the next strands that need brushing. Your child laughs, and the hair gets brushed. (This trick works with any other creature hunt—try searching out mice, rabbits, and so on.)