ARMDC (Augmented Reality Mentally Disabled Children's Game) project developed for kids with mental disabilities who have a potential lack of education technology this type of kids are still learning by using some traditional and primary tools, or by using curriculums of normal students of KG2, KG1, Year 1, Year 2 classes of governmental or special schools, which their books and tools were not designed and developed for this type of kids. so in this project the learning material that the smart book application will provide include the basics of Arabic and English letters, the four seasons, human body parts and many other contents depending upon any additional needs for the student.