Answer:
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
Name for zenith
I always follow my brother but you cannot see me, only him. You cannot hear him but you can hear me. What are we?
What can be swallowed, But can also swallow you?
What is lengthened by being cut at both ends?
What did the piece of wood say when he saw the screwdriver and screws approaching?