University of Iowa Dance Marathon. 24 Hour event which raises money for the University of Iowa Children's Hospital. Combined. The Marathon is preceded by the Clear Channel Call for Kids with Cancer, a 2-day radioathon that kicks of the donations for the annual event. Combined, the events have raised over a million dollars each of the last 4 years. Please phone in your pledge right now at 1-800-456-2772 . It's for The Kids.