That must be some hard, thick ice to withstand all that drumming. Watching them carve and sculpt the individual pieces was interesting.
Awesome! Its interesting to see the process of making instruments out of strange, temporary materials.
All I could think about was how cold it must have been in that room with all of that ice. I know that drumming and moving around helps, but still, the room has got to be cold enough to prevent the ice from melting too soon.