Complex sentence: Tracy's Kids is an organization that aims to help children and families handle the emotional issues that accompany a diagnosis of cancer for a time when the disease will be cured or in remission ("Tracy's kids").
Split into simpler sentences: Tracy's Kids an organization that aims to help children and families to be better equipped to handle the emotional issues that accompany a diagnosis of cancer. It also prepares families for a time when the disease was cured or in remission ("Tracy's kids").