Police say the children, who are of Asian descent and do not speak English, were found around 6:00 am. in the area of Broad and Passyunk.
Police were able to find a neighbor who knew where the kids lived and made contact with the mother.
Action News was there as the mom came into the Special Victims Unit carrying an infant. The father arrived a short time later.
The mother told police that she was sleeping when the children got out, which may have happened after the father went to work early this morning.
The children are okay and the family is being interviewed by DHS.
Once DHS approves, police expect everyone to be allowed to go home.