Todays talk is about sleep, the fairies discuss how much sleep is needed to be efficient and the different type of sleepers.  In  The Room of Spirit and Time a dangerous game of magic shiritori is played.
cause problems the next day because 
you didn't get enough sleep.
causar problemas al día siguiente por no dormir lo suficiente.
que podrías liarla al día siguiente por no haber dormido lo suficiente...
você terá problemas devido 
à insônia no dia seguinte.