Answer:
What force and strength cannot get through I with my unique teeth can do.
I'm blue, but when you see me I'm red. You don't see me too often. I'm there for you if you're hurt, but I'm good for you. What am I?
When I am alive, people sing. When I am dead, people clap hands. What am I?
I'm a precious stone in a pack of cards. What am I?
I have hundreds of ears but cannot hear a thing. What am I?
It rows quickly with four oars but never comes out from under his own roof. What is it?