["My daughter has been taking ballet since she was 2 - she's almost 16 now.", 'wow, she should be very good?', "Well, she knows all the steps now, it's just a matter of working on perfecting them I guess.  She's very dedicated though and takes class 6 days a week."]
That is very good.
My daughter has been taking ballet since she was 2.  She's almost 16 now and is very dedicated and focused and takes class 6 days a week.