Butler County Civil War Roundtable is sponsoring its first Downtown Butler Ghost Walk at 7:30 p.m. Saturday and Oct. 29. The 60-minute guided tour will begin in Diamond Park. Tickets are $10. For reservations, call 724-256-9020. Children younger than 18 must be accompanied by an adult.

<B>Phipps Conservatory and Botanical Gardens</B> presents the fall flower show through Nov. 6, daily from 9:30 a.m. to 5 p.m. Admission is $12 for adults; $11 for senior citizens and students with valid ID; $9 for children ages 2 to 18; and free for children younger than 2. Call 412-622-6914 or visit the website www.phipps.conservatory.org.<B>National Aviary</B>, 700 Arch St., hosts “Owl-o-ween,” a not-too-scary event, from 6 to 8 p.m. Saturday, featuring a costume contest, storytelling, crafts, and appearances by the aviary’s hissing cockroaches. Registration is suggested. Cost is $13 per adult and $11 per child. Call 412-323-7235.<B>Children’s Museum</B>, 10 Children’s Way, Allegheny Square, will be the site of a Mini Maker Faire, a family festival featuring do-it-yourself robots, mobiles, electronics, 3-D printing and wool spinning, from noon to 6 p.m. Sunday. Museum hours are 10 a.m. to 5 p.m. Mondays to Saturdays and noon to 5 p.m. Sundays. Admission is $12 for adults, $11 for children ages 2 to 18 and senior citizens, and free for children younger than 2. Call 412-322-5058 or visit www.pittsburghkids.org.