Answer:
When it is alive we sing, when it is dead we clap our hands. What is it?
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around.
Two people are born at the same moment, but they don't have the same birthdays. How could this be?
Goes over all the hills and hollows. Bites hard, but never swallows.
Hard to catch, easy to hold. Can't be seen, unless it's cold
What never gets any wetter no matter how hard it rains?