Familias First, Where Families Come First. We are an established agency in Southern California specializing in the delivery of Behavioral Services to children with autism and other developmental delays. Familias First serves clients ages 18 months to 16 years (other ages served on a case-by-case basis) throughout the Greater Los Angeles County and Inland Empire. Our ABA services embrace the Regional Center Behavior Modification (BMOD) model with emphasis on parent education and training, and the Discrete Trial Training (DTT) model which emphasizes intensive, direct instruction to the child in order to teach him/her fundamental life skills.