A simple bone cyst is a common benign lytic lesion in the pediatric population. Successful methods of treatment include injections with bone marrow and curettage of the cyst and filling with bone graft or bone graft substitute. Opening the cyst walls and creating a connection with the medullary canal promote healing. We describe a simple method of opening the cyst walls without creating a large cortical defect, using the AO Titanium Elastic Nail. This flexible nail allows creation of connections to the medullary canal in several directions through one cortical hole.