Answer:
When will water stop running down hill?
What is born on the ground but floats to the sky, to be returned back again from the clouds up high?
Retired people want these to be large and birds want them to hatch.
I am the yellow hem of the sea's blue skirt.
It's been around for millions of years, but it's no more than a month old. What is it?
What did the piece of wood say when he saw the screwdriver and screws approaching?