Answer:
Retired people want these to be large and birds want them to hatch.
What do you have in December that you don't have in any other month?
Passed from father to son and shared between brothers, its importance is unquestioned though it is used more by others.
They can be long or short; they can be grown or bought; they can be painted or left bare; they can be round or square.
An art-form and its colourful result.
I build up castles. I tear down mountains. I make some men blind. I help others to see.