What's This? an ESL guessing game

For this class, students are learning school items (a book, a pencil, a pen, an eraser).
Review and display your vocabulary words. 
Intro Key phrases: 
Is it a pen? a pencil...? etc...etc
               Yes, it is! 
               No it isn't. 
Hide the cards close to your chest. team by team, let them guess using KP 
Answer using KP.
The team that guesses correctly gets a point. 
Make things even more fun by having students come up in your place and do the answering.