What is it?
It's a newspaper.
What are they?
They're glasses.
What is it?
It's a box of tissues/It's a tissue.
What are they?
They're keys.
What is it?
It's a computer.
What is it?
It's a pencil.
What is it?
It's a photo.
What are they?
They're scissors.
What is it?
It's a book.
What is it?
It's a (mobile/cell) phone.