In USAG there is compulsory gymnastics and optional gymnastics. Compulsory gymnastics is levels one through six in Colorado. In compulsory every gymnast does the same routines on each event. The floor music is also the same for every gymnast. Optional gymnastics is levels seven through ten as well as elite. In optional gymnastics every gymnast makes their own routine following certain standards. The gymnast gets to chose what music they want, but it must be a certain time and must not have words. Both kinds of gymnastics are fun. Optional is definitely more fun to watch, but compulsory is easier to learn.