The current study was aimed to develop a home-based early intervention program based from activity-based approach and to prove the effectiveness of the program on 18 month old child with developmental delay/risk of delay. Developmental delay was assessed with DENVER II Developmental Screening Test (DENVER II DST) at first. The child was also assessed in detail within the current study and it was determined that the child had developmental delay. After receiving family's approval, procedures were conducted according to the steps of early intervention. After detailed evaluations, filling the Individualized Family Service Plan and determining the goals for the child, researcher implemented the early intervention program. All of the family members were incorporated with the program and 36 developmental support programs were implemented in home environment. Results show that the early intervention program has a positive effect on the child's development and mothers' opinion is positive about the program.