Answer:
Double my number, I'm less than a score. Half of my number is less than four. Add one to my double when bakers are near. Days of the week are still greater, I fear.
A circle of stones, never in rows. Stacked one on the other, mystery it sows. What is it?
What is that you will break everytime you name it?
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
Who works when he plays and plays when he works?
I can only be played on a windy day