Knock Knock, Trick or Treat!Knock, knock, trick or treat! Knock on the doors and lift the flaps to see whos hiding inside this spooky haunted house! Come with me, right down my street. Who knows what creatures we might meet? Knock knock, trick or treat! Give us something good to eat. Knock Knock, Trick or Treat! invites you to knock on this haunted house to find out what kind of Halloween monsters are waiting inside if you dare! From a ghost to a witch to a skeleton and more,