Who's this?
Grandpa
What is it?
it's a house
which room is it?
it's the kitchen.
which room is it?
it's the living room.
Where do you go?
I go downstairs.
Where do you go?
I go upstairs.
which room is it?
it's the bedroom
who's this?
grandma
What is it?
it's an apartment
which room is it?
it's the bathroom
which room is it?
it's the dining room.