In this photo provided by the San Francisco Zoo, a 5-year-old Sumatran tiger named Leanne plays with her 6-week-old, 12 pound baby, in the outdoor exhibit at the San Francisco Zoo, Monday, April 14, 2008 in San Francisco. His mom delivered triplet male cubs on March 7. She debuted them today, one at a time, in the outdoor public exhibit. [Agencies]