Knock,knock, trick or treat!

A petición de algunos papás,os pongo la letra de la canción de Halloween que trabajaremos en clase.
De paso,aprovecho para deciros que es de una serie de CDs que se llaman Super Simple Songs (www.supersimplesongs.com) y que tienen canciones para trabajar muchos temas de vocabulario de inglés, por si a alguien le interesa.

Knock knock. Trick or treat?
Who are you?
I'm a ghost. I'm a little ghost.
Knock knock. Trick or treat?
Who are you?
I'm a ghost. I'm a little ghost.

Knock knock. Trick or treat?
Who are you?
I'm a cowboy. I'm a little cowboy.
Knock knock. Trick or treat?
Who are you?
I'm a cowboy. I'm a little cowboy.

Knock knock. Trick or treat?
Who are you?
I'm a witch. I'm a little witch.
Knock knock. Trick or treat?
Who are you?
I'm a witch. I'm a little witch.

Knock knock. Trick or treat?
Who are you?
I'm a monster. I'm a little monster.
Knock knock. Trick or treat?
Who are you?
I'm a monster. I'm a little monster. 

Knock knock. Trick or treat?
Who are you?
I'm a ballerina. A little ballerina.
Knock knock. Trick or treat?
Who are you?
I'm a ballerina. A little ballerina.

Knock knock. Trick or treat?
Who are you?
I'm a pirate. I'm a little pirate.
Knock knock. Trick or treat?
Who are you?
I'm a pirate. I'm a little pirate. 

Knock knock. Trick or treat?
Happy Halloween. Happy Halloween.
Knock knock. Trick or treat?
Happy Halloween. Happy Halloween.