The Bob Sierra North Tampa YMCA, 4015 Ragg Road, will host a LEED Recognition Ceremony and Open House on Sept. 17. The LEED Gold Certification ceremony will be at 10 a.m., followed by a National Gymnastics Day Open House from 10:30 a.m. to 2 p.m. Guests can tour the 12,000-square-foot gymnastics center and try out the equipment. There will be music, food, face painting, activities and a performance from Bob Sierra’s Top Flight Gymnastics Team. Admission is free. For information, visit tinyurl.com/za5mhw3.