Scuba diving is becoming a mainstream sport, according to dive instructor Bill Downey of Downey Diving in Baden

.Children as young as 12 can be certified, though younger children can attend dive classes to get a feel for the water. There is also no upper age limit on scuba diving as long as participants are in good health and can swim.Open water certification typically requires six pool sessions and four open water dives under an instructor's supervision.Divers can rent equipment or purchase their own and certification in group classes costs about $400 per person, though costs vary depending on instructors and facilities.Scott's Scuba Service in Freeport offers classes at the Butler County Family YMCA. Downey Diving offers classes at the Rose E. Schneider YMCA in Cranberry Township and through Butler County Community College at the Seneca Valley High School pool.