Answer:
I am a portal to another world which you cannot enter. Only you can see me but I can't see you.
I am the signature stroll of ducks and penguins
What is that you will break even when you name it?
What language does a billboard speak?
I have four fingers and a thumb, but I'm not living. What am I?
What did the piece of wood say when he saw the screwdriver and screws approaching?