Ballet NY Dancing can provide an outstanding cardiovascular   workout, but this week the members of Ballet NY come to Pittshurgh to dance for people whose hearts need help. The performance will benefit the Artificial Heart Program of the Heart, Lung and Esophageal Surgery Institute of UPMC. Ballet NY was founded 10 years ago by former New York City Ballet principal ballerina Judith Fugate and internationally famous dancer Medhi Bahiri, and former members of top dance companies. The performance starts at 8 p.m. Wednesday at the Byham Theater, Downtown.  Admission: $35~$125.  The top price includes post-concert coffee and dessert reception with the dancers.  Details: 412-453-7777. Classic rock, literally Mannheim Steamroller will bring a breath of "Fresh Air" to the Benedum Center, Downtown, Monday. The band, which blends   classical and rock influences with electronic and ancient instruments, is on the road in its "Fresh Air" tour. The name comes from a series of eight albums with that title. Music begins at 8 p.m.  Admission: $40, &50 or $60.  Details: 412-456-6666. Expansive endeavors Outdoors adventure goes beyond fun. It is a way of encountering the weakness of our existence and seeing ourselves as rather small creatures after all. The Banff Mountain Film Festival helps us see that with movies that also are just downright good. Sponsored here by Venture Outdoors, the festival will be at 7 p.m. Thursday and Friday at the Byham Theatre, Downtown, with different films each night.  Admission: $10, or $15 for both nights, in advance; $15 at the door.  Details: 412-255-0564. In bloom Children with spring fever   can find an outlet on Saturday at the Frick Art& Historical Center, which is hosting "Green Kids--What's up?" The program brings children aged 4-8 into the garden on Frick's Point Breeze grounds, so that they can see what flowers are coming up in the early spring. The program, which runs 11-11:45 a.m., is free and includes an interactive tour and take-home activity. Meet in the Visitors' Center at the Frick, 7227 Reynolds St., Point Breeze.  Details: 412-371-0600. If you are a music fan, you should go to   _  .
Expansive endeavors Classical rock, literally Ballet NY In bloom