"Your teachers sound like they're a bucket of laughs," Charlie tells her, charming a chocolate bar so that it floats right in front of Aggie's face, waiting for her to pluck it out of thin air. "They should know better than to reinforce the whole 'appearances say everything about a person' rubbish."

"I'm glad you like it," he grins at his friend. "Mum left me in charge of the decoration. Rather daring of her, really."