Answer:
I am in truth a yellow fork from tables in the sky by inadvertent fingers dropped the awful cutlery. Of mansions never quite disclosed and never quite concealed the apparatus of the dark to ignorance revealed.
I work when I play and play when I work. What am I?
I am heavy forward, but backward I'm not. What am I?
I go from house to house a messenger small and tight. Whether it rains or snows I sleep outside at night.
Everyone has me except for a few. You may not be able to identify me but I can always identify you. What am I?
I tell people to be careful when handling boxes.