The Audubon Nature Center and Aquarium in Bristol is hosting a day full of fright-free tricks and treats along the trail on Saturday, Oct. 21, from 10 a.m. to 2 p.m. Enjoy outdoor explorations, games, crafts, and more. Owl presentations will take place at 10:30 a.m., 12 p.m. and 1:30 p.m. Costumes are encouraged, and all ages are welcome. Advance registration is required. Fee: $5/member child, $7/non-member child. Ages: 3-10. Register online through the events calendar at asri.org/calendar