Answer:
What does everyone know how to open but not how to close?
What goes in the water black and comes out red?
You heart it speak, for it has a hard tongue. But it cannot breathe, for it has not a lung.
Both old people and owls are said to be possessing this trait
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
What did the piece of wood say when he saw the screwdriver and screws approaching?