Fall Fun Festival returns to downtown Blue Springs. Noon to 10 p.m. Friday, 10 a.m. to 10 p.m. Saturday, and 10 a.m. to 4 p.m. Sunday. Food, crafts, games, carnival rides, more than 250 vendors. Park and take the shuttle from 5 to 10 p.m. from Side Pockets, east side of the parking lot near Missouri 7, and Cosentino's Price Chopper North, east side of the parking lot toward M-7.

“The Hollow,” an Agatha Christie play presented by City Theatre of Independence, 7:30 p.m. Friday, 7:30 p.m. Saturday and 2 p.m. Sunday in the Powerhouse Theatre inside the Sermon Center, Truman and Noland roads, Independence. Tickets are $15 for adults; $13 for ages 60 and older and students with a current student ID. Tickets may be purchased at www.citytheatreofindependence.org or by calling 325-7367.

Emergency Preparedness Fair: 9 a.m.-3 p.m., Saturday, Truman Library, 500 W. U.S. 24, Independence. Call 325-7168. See how emergency response has evolved since President Truman signed the Federal Civil Defense Act, with ham radio operators, emergency response vehicles and more.

4. Paranormal Investigation: For ages 12 and older, two sessions 7 or 9:30 p.m., Missouri Town 1855, 8010 E. Park Road, Lee's Summit. Cost: $20 per person. Advanced reservations required. Visit www.makeyourdayhere.com. Call 229-8980. Participate in a search for paranormal activity with trained ghost hunters. No pets allowed.

5. “J.R.R. Tolkien and the Legacy of World War I,” 6:30 p.m., Midwest Genealogy Center, 3440 S. Lee's Summit Road, Independence. Free, but registration is required. Call 252-7228. The life of author J.R.R. Tolkien was shaped by his experiences during World War I and time spent fighting in the Somme. Learn how the war influenced his works.