Magical flute from the comic book Fairy Tale Parade
#1 (June-July 1942). It is loaned to humble Irish villager kid Pat by a grateful leprechaun named McTootle, in gratitude for rescuing him from being stuck in brambles. Also Pat's mom also made McTootle some new pants. Pat uses it to magically compel the hated, very pompous King and Queen to dance. Their feared giant also dances and is revealed to merely be a dwarf on stilts. All three flee of embarassment, and Pat is declared the new king.