National Geographic

Above: Danna and her mother, Olga Alfonso, care for two robotic babies—assigned to Danna becauseOlga had twins. Below: Alexandra Guerrero, 15, falls asleep while feeding “Estiven.” Right: Co-parent JefrinBayona, 15, cares for Estiven while eating dinner at his home in Tame, Colombia. “It’s a huge responsibility,”Jefrin says of fatherhood. “I want to have kids, but only when I’m older and can take good care of them.”