♫ Knock knock, [Pretend to knock on a door.] trick or treat? [Trick-or-treat gesture.] Who are you? [Shrug your shoulders and then point forward.] I'm a ghost. I'm a little ghost. [Point to yourself. Ghost gesture.] Knock knock, trick or treat? Who are you? I'm a ghost. I'm a little ghost. [Float around the room making ghost noises.] Knock knock, trick or treat? Who are you? I'm a cowboy. I'm a little cowboy. [Point to yourself. Cowboy gesture.] Knock knock, trick or treat? Who are you? I'm a cowboy. I'm a little cowboy. [Move around the room like cowboys riding on horses.] Knock knock, trick or treat? Who are you? I'm a witch. I'm a little witch. [Point to yourself. Witch gesture.] Knock knock, trick or treat? Who are you? I'm a witch. I'm a little witch. [Fly around the room like witches riding on broomsticks.] Knock knock, trick or treat? Who are you? I'm a monster. I'm a little monster. [Point to yourself. Monster gesture.] Knock knock, trick or treat? Who are you? I'm a monster. I'm a little monster. [Stomp around the room with your arms in front of you like Frankenstein's monster!] Knock knock, trick or treat? Who are you? I'm a ballerina. A little ballerina. [Point to yourself. Ballerina gesture.] Knock knock, trick or treat? Who are you? I'm a ballerina. A little ballerina. [Stand on your tippy toes and spin in circles.] Knock knock, trick or treat? Who are you? I'm a pirate. I'm a little pirate. [Point to yourself. Pirate gesture.] Knock knock, trick or treat? Who are you? I'm a pirate. I'm a little pirate. [Make pirate voices - Aaaaarrrrghhh! - and pretend to have sword fights.] Knock knock, trick or treat? Happy Halloween. Happy Halloween. [Halloween gesture.] Knock knock, trick or treat? Happy Halloween. Happy Halloween.