Katie is six years old and her younger sister Abby is four years old. Tonight they will go Trick or Treating with their parents. They are very excited. Katie has done it before but this is the first time for Abby. Katie will dress up as a witch and her sister will dress up as a ghost. Katie has a black bag for her candy and Abby has a white bag. Their parents will wait in the car while Katie and her sister knock on the doors. They will visit about seven or eight houses.