I, too, have been looking for such classes for my toddler and found a great studio that teaches dance for kids. It's really fun and develops creativity. I can recommend checking out the Kids in the Beats website - they offer a variety of dance programs for kids of all ages, including three-year-olds. I'm sure your son will love it there!
Looking for classes for my 3-year-old son to develop his creativity. I am considering developmental dance classes. Maybe someone has already practiced with children of similar age and can share their experience or recommend studios?