With visions of my slippers dancing through his head

Because you don't really think that this boy is day-dreaming about all the good things of Christmas, do you? No, I assure you that he isn't. What he's doing right here is wondering what new sort of mischief he can get into as soon as he jumps off the couch, aided and abetted by Zuzu, his partner in crime. It's like having two toddlers in the house again -- two really naughty (but unbelievably cute and funny) toddlers.