Aim: The aim of this study was to study the outcome of fractures of the supra–condylar humerus  in children treated by cross pinning and following a specific post–operative protocol. Methodology: Forty children with displaced unilateral fracture of the supra–condylar humerus were treated surgically using cross–pinning. Elbow movements were started within the first post–operative week and pins were removed on appearance of callus. Patients were followed for six months. Results: Union was achieved in all patients. Thirty seven patients had satisfactory outcome on follow–up. No patient showed loss of reduction, signs of myositis, neurological deficit, compartment syndrome or fixed elbow stiffness. Conclusion: Post–operative care until the expected recovery, directly under the supervision of the operating surgeon, is essential for a good functional and cosmetic outcome. Not just the participation of a physiotherapist, but a clear–cut regime for post–operative care definitely adds to the increasing numbers of outstanding results of the operating surgeon.