Cannabis products are being used for a variety of conditions. In Canada, there are no cannabis products approved for use in children. Without evidence from clinical trials doctors are hesitant to recommend cannabis products for children. In order for doctors to feel confident in advising parents on medical cannabis they need better information on if these products work, how to dose them and long-term safety. Our national collaboration between parents, doctors, researchers, industry and policy makers will study the use of medical cannabis in children.