Answer:
Only two backbones and thousands of ribs.
What is it that you must give before you can keep it.
A hole leading in, a hole leading out, we connect to a cavern that is slimy all throughout. What are we?
Of no use to one, Bliss to two. Men lie for it. The baby’s right,
A precious stone, as clear as diamond. Seek it out while the sun's near the horizon. Though you can walk on water with its power, try to keep it, and it'll vanish in an hour.
What did the piece of wood say when he saw the screwdriver and screws approaching?