Inappropriate parental expectations of age-appropriate behaviors and unawareness of developmental milestones can increase instances of child maltreatment. Additionally, experiences of child maltreatment can have a negative impact on the developmental trajectory of a child. The present research describes a parental aide, the tDevelop, delivered to parents at risk for child maltreatment through SafeCare Parent-Child Interaction (PCI) training with the aim of increasing identification of developmental milestones and age-appropriate activities. Two high-risk families with children close to 24-months of age were recruited from a residential program for young mothers working to develop self-sufficiency skills. The families were presented with the tDevelop along with traditional PCI information, including Planned Activities Training and age-appropriate activities. Data from a multiple-probe, single-case experimental design, suggest that mothers are able to recognize developmental milestones with increased accuracy upon intervention with the tDevelop. These findings suggest that the enhanced PCI protocol may enhance parental identification of developmental milestones.