What is it?
It's a window.
What is it?
It's a wall. (Classroom, Board, chairs, etc)
What is it?
It's a book.
What is it?
It's a door.
What is it?
It's a colour pen.
What is it?
It's a chair.
What is it?
It's a blackboard.
What is it?
It's a bookcase.
What is it?
It's the floor.
What is it?
It's a backpack/bag.
What is it?
It's a pencil case.
What is it?
It's a ruler.
What is it?
It's a desk.
What is it?
It's a sharpener.
What is it?
It's a pen.
What is it?
It's a crayon.
What is it?
It's a whiteboard.
What is it?
It's an eraser.
What is it?
It's a pencil (and eraser).