George's nasty old grandma needs teaching a lesson. George decides the best remedy for her grumpiness is a special home-made medicine. But Grandma gets more than she bargained for! In George's Marvellous Medicine, published in 1981, George Kranky's Grandma may not anticipate the results of the medicine fed to her by her grandson, but like George, Roald Dahl also had fun mixing marvellous concoctions. He called them witches potions and delivered them to his children just before bedtime. They included ingredients like tinned peaches blended with milk and either pink, blue or green food colouring. His were put together carefully, though - none of the nasty side effects George's Grandma experienced...