ENDOST, or Friends Without Barriers, is a project of the TDP (Social Awareness Projects) student volunteer organization that focuses on the mentally disabled. Volunteers visit the ZİÇEV (Foundation for the Training and Protection of Mentally Handicapped Children) Gölbaşı facility every Tuesday to spend time with mentally disabled individuals, showing that there are no barriers in friendship. The Bilkent students and their friends at ZİÇEV play games, participate in various activities, or just enjoy talking with each other.
In order to raise awareness on December 3, proclaimed by the UN as International Persons With Disabilities Day, ENDOST posted pictures taken during their weekly visits to ZİÇEV on trees around the campus.