C.M.
She's too young for dance. She needs Music and Movement or some kind of exploration class.
Just because a child likes to do something for fun doesn't mean they want to take organized lessons. At her age she should be exploring music and gross motor skills. That's why they don't offer dance classes for kids that young.
And she is CERTAINLY too young for tap or jazz! She should be doing basic clapping moving, spinning, kicking, rolling--that sort of thing.
Try some kind of parent-tot class. She'd probably like any movement, gymnastics or music class. Plus they are wonderful for the two of you to have special time together!