Answer:
White fat and fluffy, May even look like a puppy. Seems heavy but is light, Floats about without a worry, But if it turns dark you have to hurry!
A red drum which sounds without being touched, and grows silent, when it is touched.
Break it and it is better, immediately set and harder to break again.
The higher I climb, the hotter I engage. I cannot escape from my crystal cage.
Take one out and scratch my head, I am now black but once was red.
If lightning strikes an orchestra who is the one most likely to get hit?