This is the key of the kingdom

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This is the key of the kingdom.
In that kingdom there is a city.

In that city there is a town.

In that town there is a street.

In that street there is a lane.

In that lane there is a yard.

In that yard there is a house.

In that house there is a room.

In that room there is a bed.

In that bed there is a basket.

In that basket there are some flowers.

Flowers in the basket;

Basket in the bed;

Bed in the room;

Room in the house;

House in the yard;

Yard in the lane;

Lane in the street;

Street in the town;

Town in the city;

City in the kingdom

And this is the key of the kingdom.