It's good to feel bad about lies you've told.
Nicholas is a child in his room playing with his toys after having lied to his Mother about doing his chores.
Nicholas wants to enjoy his play time.
Nicholas cannot seem to enjoy playing with his toys, so he comes clean to his mother and explains that he lied about the chores.
Nicholas plays with his toys and gets completely lost in the action, until he completely forgets that he lied to his Mother.
Nicholas has his toys taken away by his Mother until he completes his chores, and he does them.
Nicholas eventually is caught in his lie he made to his Mother and is punished for it.