Oh, beware of bleeding lung And bugs that eat their young The demons in your head The wolves under your bed The bones of dinosaurs Hidden below the floors They rattle and they shake And make the sound that Wakes me up most every night Breaks me softly, fireflies take flight The sandman you must trust He sprinkles golden dust The howling of the owl Makes me sleepwalk on clouds A thousand pianos play I still hear them the next day A barrel full of snakes They make the sound Wakes me up most every night Breaks me softly, fireflies take flight ♪ The thorn that stays so firmly in my side These fireflies leave me behind ♪ The bones of dinosaurs Hidden below the floors They rattle and they shake And make the sound that Wakes me up most every night Breaks me softly, fireflies Wakes me up most every night Breaks me softly, fireflies take flight