Folkfest St. Pete: Contemporary folk art and music are on hand at this street festival and fundraiser for the Creative Clay Cultural Arts Center. There's music by local artists Applebutter Express, Geri X, Rebekah Pulley and more, plus food vendors, a beer garden and a family area with children's activities. 11 a.m. at Albert Whitted Park, 107 Eighth Ave. SE, St. Petersburg. $5, $50 VIP. (727) 825-0515.
Sykes Chapel Concert Artist Series: Concertos for Organ: Organists and University of Tampa faculty Haig Mardirosian and Ryan Hebert perform with a professional chamber orchestra on the program . Seating is limited; doors open 30 minutes before show. 2 p.m. at University of Tampa Sykes Chapel, 401 W Kennedy Blvd., Tampa. Free. (813) 253-3333.
Kids and family
H&R Train Show: At this 62nd installment of H&R Trains' judged layout competition, there are model railroading exhibits of every scale, vendors, how-to classes, seminars, demonstrations, train races, train car painting and door prizes. 10 a.m. at H&R Trains, 6901 U.S. 19 N, Pinellas Park. Free. (727) 526-4682.
Elmo Makes Music: Elmo, Big Bird and other Sesame Street characters star in this show about a teacher who needs help making music. 1 and 4:30 p.m. at the University of South Florida Sun Dome, 4202 E Fowler Ave., Tampa. $12-$57. (813) 974-3004.
The Simpsons, 8 p.m., Fox It's Treehouse of Horror time already? Thanks, unbelievably long baseball playoffs.
More to explore
It's the season for outdoor markets around the bay area. Find a list of them at tampabay.com/things-to-do.