Wizard Fuddle was very good at magic. Almost.
He tried to conjure a rabbit. Out came a radish.
He tried to turn a rock into a diamond. It became a slightly shinier rock.
He tried to make himself invisible. His hat disappeared instead. He could still see everything. Everyone could still see him. He just had no hat.
"Hmm," said Wizard Fuddle.
He tried one last spell — to make a magnificent feast appear.
A single cheese sandwich appeared on the table.
Wizard Fuddle sat down, ate his sandwich, and thought carefully.
Then he picked up his spell book, found page forty-seven, and realised he'd been reading it upside down for thirty years.
"Ah," he said. "That explains quite a lot."