“We have opened Viljans värld, a playful world where kids can play and learn about history,” says Olof Hermelin, managing director at Östergötlands museum. The mysterious forest is part playground, part traditional exhibition, named after the gnome Viljan who tells the story of planet Earth. “It has a spaceship, an ant hill and a giant oak tree to explore,”says Hermelin and adds that real historic items are also on display.