When you're old enough to write a book for children, by then you'll have become a grown up and have lost all your jokeyness. Unless you're an undeveloped adult and still have an enormous amount of childishness in you.
Roald DahlShe might even be your lovely school-teacher who is reading these words to you at this very moment. Look carefully at that teacher. Perhaps she is smiling at the absurdity of such a suggestion. Don't let that put you off. It could be part of cleverness. I am not, of course, telling you for one second that your teacher actually is a witch. All I am saying is that she might be one. It is most unlikely. But--here comes the big "but"--not impossible.
Roald DahlYou mean you live down here?' Matilda asked. 'I do', Miss Honey replied, but she said no more. Matilda had never once stopped to think about where Miss Honey might be living. She had always regarded her purely as a teacher, a person who turned up out of nowhere and taught at school and then went away again.
Roald Dahl