It’s a bedtime story a little bit reminiscent of Goodnight Moon, but in a softer, more lyrical sort of way.  And instead of saying goodnight to the things in the room, the young boy and his friend are walking around the whole farm/household watching as the world settles into night.  There are only a few words per page, with lots of repetition and rhyme.  The illustrations set a quiet bedtime mood.  It’s sweet.