The cubs — two females and a male — were born Dec. 23 to Conde and Bety at the zoo in the Argentine capital, and had since been kept out of view.
"This is their first big day out," zoo spokeswoman Ana Maria Pirra told The Associated Press, adding the cubs were in good health.
Pirra said the cubs weighed about 2.2 pounds at birth and were gaining weight fast, with each now weighing about 13 pounds.
She said none of the cubs has yet been named, and that children — who watched with delight as the cubs cavorted playfully Thursday — deposited name suggestions in a box at the zoo, along with their contact information. The cubs' names will be chosen in a drawing in three months, she said.
"Each of the winners will be a godfather or godmother to a cub," Pirra said.
Conde and Bety had triplets in 2002, and two years later had another six cubs.