Ann Arbor Main Street area merchants welcome your little costumed characters to the neighborhood with greets and treats all day from 11AM-5PM. Black and orange balloons distinguish participating businesses. Don't forget to stop by the Ann Arbor District Library for a Halloween Party that includes stories, puppets and trick-or-treats. Library show times at 10:00AM and 11:30AM. Stroll down Main, Liberty, Washington, Ashley, Fourth and Fifth Streets to Trick or Treat participating businesses- and remember to stop by the Washtenaw County Courthouse on North Huron Street! A fun activity for the family that you won't want to miss!