What is this?
It's a ball.
What is this?
It's a doll.
What is this?
This is a car.
What is this?
It's a yo-yo.
What are these?
These are yo-yos.
What are these?
These are cars.
What are these?
These are dolls.
What are these?
They are blocks.
What are these?
These are balls.
What are these?
These are puzzles.