Kids and Families. The Twin Tiers' largest indoor Trick or Treat event is at the Arnot Event Center. Come Trick or Treat with us at Arnot Mall with fun, decorated booths in the Arnot Mall Event Center on October 29th, from 3 pm-5 pm. We'll be giving away tons of candy and special prizes! THIS IS A FREE EVENT FOR TRICK-OR-TREATING KIDS!