“But I put six of Mummy’s sleeping-pills squashed-up in it,” continued Gwinny, “and detergent and the bottle from the cupboard that says Poison and some firelighter and ammonia, and then I rolled it on the floor to get germs and spat on it for more germs, and instead of sugar on the outside I put the burning kind of soda. And I think it ended up awfully poisonous.”