Once upon a time there was a big castle (that was a bit draughty due to incomplete walls).
And every day the castle had people that happily lived in it.
Until one day the castle was 16 years old.
And because of that it transformed.
And because of that it grew wheels on its turrets and started to drive upside down like a car.
Until finally it wanted to become a castle again.
And ever since it kept the wheels but didn’t become a car again.