Answer:
What has three ways out and just one way in?
What does a WW1 Trench, A Submarine and a Popular Phone App all have in common?
Golden treasure I contain, Guarded by hundreds and thousands. Stored in a labyrinth where no man walks, Yet men come often to seize my gold. By smoke I am overcome and robbed, then left to build my treasure anew
What always goes to bed with his shoes on?
What has one eye but cannot see?
What did the piece of wood say when he saw the screwdriver and screws approaching?