Is this a book?
Yes, it is
What's this?
It's a rubber
Are these scissors?
Yes, it is
Is this a pencil?
No, it isn't
What's this?
It's a ruler
Is this a sharpener?
Yes, it is
What's this?
It's a pencil case
Is this a sharpener?
No, it isn't
What's this?
It's a school bag