Answer:
What is so fragile that saying its name breaks it?
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.
If I have it, I don't share it. If I share it, I don't have it. What is it?
The itsy bitsy teeny weeny yellow polka dot variety is quite popular.
The eight of us move forth and back. To protect our king from the foes attack.
You use it between your head and your toes, the more it works the thinner it grows.