Moomins do not like winter. In one of Tove Jansson’s stories, Moomin’s Winter Follies, young Moomintroll bumps his head when the sea ‘goes hard’, prompting Moominmamma and Moominpappa to hurry the family into hibernation. They attempt to follow the tradition of their ancestors by scoffing pine needles and covering the furniture in dust sheets before bedding down on hay, but Moominpappa, for one, is troubled by the prickliness of all this: ‘Who said I must do like my ancestors?’ They briefly abandon the idea and postpone their sleep to try some winter sports, but Moomins are not really built for...