Jimmy was born missing the portion of his right leg below the knee, with dislocated hips, without ligaments in his left knee, and with a diaphragmatic hernia. He had severe motor deficits and poor balance and coordination. As a result, he often fell. Jimmy walked awkwardly and then only with use of a rolling walker. He was 8 years old when he met the inventor of the Interactive Metronome, the late Jim Cassily. Little did Jimmy know that IM was going to change his life.