Answer:
What has thousands of ribs and two backbones?
What goes up when the rain comes down?
It's shorter than the rest, but when you're happy, you raise it up like it's the best. What is it?
What is always coming every day, but never arrives until the next?
You use it between your head and your toes, the more it works the thinner it grows. What is it?
What is always coming but never arrives?