Horizon is a full-summer day camp for children with cancer and their siblings, ages 3 1/2 – 16 years, who are in active or follow-up treatment for cancer. There is no charge for the Day Camp and Year-Round Programs. Parents procure applications from their doctors,nurses or health care providers. Its affiliated hospitals are the Pediatric Oncology Departments at Sinai , John’s Hopkins and University of Maryland. The Camp is a member of The Sunrise Association, whose mission is to bring back the joys of childhood to children with cancer and their siblings world-wide.