Answer:
A hole in a pole, though I fill a hole in white. I'm used more by the day, and less by the night.
What stays the same size no matter how much they weight?
You can spin, wheel and twist, but this thing can turn without moving. What is it?
Come up and let us go. Go down and here we stay.
What has four legs during the day; and six or eight during the night?
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.