Answer:
I am the heart that does not beat. If cut, I bleed without blood. I can fly, but have no wings. I can float, but have no fins. I can sing, but have no mouth.
What is the smallest bridge in the world?
We travel much, yet prisoners are, and close confined to boot. Yet with any horse, we will keep the pace, and will always go on foot.
A kind of weather that comes your way, but add a "D" and it will run away
What kinds of men are always above board?
What is full of holes but still holds water?