Frightday Night, Oct. 21 from 6 to 9 p.m., Oak Park Conservatory:
Despite creatures stirring in the Bootanical Forbidden Forest kids can trick or treat with eco-friendly bags. 6-8 p.m. is recommended for children 12 and under, 8-9 p.m. for ages 13 and up. Cost is $5. For more information, call 708-725-2400 or visit the Conservatory website. 615 Garfield St. (at East Avenue).