Dancers express ideas, stories, rhythm, and sound with their bodies. Some dance in ballet; others perform modern dance. Dancers work in musical shows, in folk, ethnic, tap, and jazz dances. To become a dancer, one must be agile, flexible, have good body tone, and a supple body. Training begins at age 5 to 8 in ballet, usually by private teachers and in ballet schools. Boys often start training later than girls. Students who are good by their early teens get more advanced training. There are a lot of people who want to be professional dancers and choreographers, but not so many jobs. Only the most talented will find regular work.