Moxie, a young lion cub and her mother, Sukari, take a stroll at the Bronx Zoo in New York. Born in November 2008, Moxie was the first lion born at the Bronx Zoo in 31 years. The Pittsburgh Zoo and PPG Aquarium will offer free admission to all moms accompanied by a child on Mother's Day. Moms also can enjoy chair massages, makeup demonstrations, hair consultations and more. All activities are from 11 a.m. to 3 p.m., and are free with general admission. The National Aviary also offers free admission to mothers and grandmothers on Sunday.