What's this?
It's a pen.
What's this?
It's a ruler.
What's this?
It's a classroom.
What's this?
It's a pencil.
What's this?
It's a chair.
What's this?
It's a book.
What's this?
It's a board.
What's this?
It's a school.
What's this?
It's a rubber/ an eraser.
What's this?
It's a desk.