Answer:
To unravel me you need a simple key, no key that was made by locksmith's hand. But a key that only I will understand.
Who is it that rows quickly with four oars, but never comes out from under his own roof?
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.
What always goes to bed with his shoes on?
Who works when he plays and plays when he works?
Why was the cook arrested?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?